Roberto Tamayo - Academia.edu (original) (raw)

Papers by Roberto Tamayo

Journal of Child & Adolescent Trauma, 2022

Rareza y estado de conservación de especies arbóreas del bosque mesófilo de montaña en la

Disparities in access and utilization of substance abuse treatment (SAT) among Latinxs, accentuat... more Disparities in access and utilization of substance abuse treatment (SAT) among Latinxs, accentuated by this population's rapid growth, create a public health issue. Although substance abuse literature has given more consideration to environmental factors and social support concerning treatment outcomes, current substance abuse models fail to address important contextual and cultural aspects for Latinxs in recovery, including acculturation. The proposed study aims to test out a multidimensional acculturation model on a sample of 131 Latinxs (Mage= 36.3; SD±10.4, 117 males, 49% immigrants) who recently completed SAT. Specifically, the proposed study employed a conditional process model using the PROCESS Macro for SPSS to examine the association between behavioral acculturation and substance use behavior in the past six months on nativity status at different levels of attitudinal acculturation. Results yielded that, after controlling for age and substance use, higher endorsement of...

Polish Botanical Journal, 2001

A new genus Pachygenium (Schlecht.) Szlach., Tamayo & Rutk. (Orchidaceae, Cyclopogoninae) is prop... more A new genus Pachygenium (Schlecht.) Szlach., Tamayo & Rutk. (Orchidaceae, Cyclopogoninae) is proposed. It differs from the closely related Pelexia Poit. ex Lindl. in its saccate spur and the basal part of the lateral sepals, the strongly incurved lower part of the lip, the truncate apex of the stigma, and massive rostellum and viscidium. 38 new combinations are validated.

Introduction: Metabolic syndrome affects more than 25% of the Mexican population. This is attribu... more Introduction: Metabolic syndrome affects more than 25% of the Mexican population. This is attributable to a combination of genetic and environmental factors. Objective: Determine the prevalence of risk factors of metabolic syndrome in a sample of students from Pablo Guardado Chávez University in the city of Tuxtla Gutiérrez, Chiapas, Mexico. Methods: A descriptive cross-sectional study was conducted of 190 students (99 female and 91 male) aged 17-28. Anthropometric measurements were taken: body mass index and waist circumference. Determination was made of blood pressure, heart rate, and levels of serum cholesterol, triglycerides and glucose. Results: Nine students were diagnosed with metabolic syndrome based on ATP-III criteria. The most common risk factors of metabolic syndrome were android obesity, hyperglycemia, hypertriglyceridemia, hypercholesterolemia and hypertension. Of the sample studied, 51 % presented risk factors of metabolic syndrome. 35.26 % were overweight and 15.80 %...

Disparities in access and utilization of substance abuse treatment (SAT) among Latinas/os, accent... more Disparities in access and utilization of substance abuse treatment (SAT) among Latinas/os, accentuated by the rapid growth of this population are creating a public health issue. Among those in need of SAT, only 7.7% receive treatment and nearly half of these individuals complete SAT or continue their recovery in a controlled environment. Additionally, Latinas/os who complete SAT reported their needs were not met in treatment. Although substance abuse literature has given more consideration to environmental factors and social support in relation to treatment outcomes, current substance abuse models fail to address important contextual and cultural aspects for Latinas/os in recovery. The inclusion of acculturation in substance abuse models is needed to further our understanding of the socio cultural and contextual factors implicated in the recovery process among Latinas/os. Research that examines acculturation theories using a critical lens is needed to expand current notions of accul...

Journal of the American Academy of Child & Adolescent Psychiatry, 2021

Public health (Fairfax, Va.), 2016

The significant research gap on Latino adults who completed substance abuse treatment (SAT) impac... more The significant research gap on Latino adults who completed substance abuse treatment (SAT) impacts the provision of substance use prevention and treatment for this population. Given the need for culturally-appropriate SAT for Latinos, research that examines the role of cultural constructs and acculturation in relation to substance use behavior is warranted. The purpose of the present study is to test, based on the social control theory, a multiple moderation model using the PROCESS macro(1) to examine the moderating effect of Familismo on the association between history of family conflict and years of substance abuse on Latino males who completed SAT at different levels of acculturation (i.e., cultural orientation). Generational status (i.e., immigrant, U. S. born) and age are used as covariates. A total of 117 Latino male participants (Mage= 37, 54% non-U.S. born with a mean length of stay of 19 years in the U.S.) who completed SAT from facilities located in the metropolitan area ...

Acta Botanica Mexicana, 1993

Se propone como especie nueva Liparis volcanica, conocida de los estados de Nayarit, Jalisco y Mi... more Se propone como especie nueva Liparis volcanica, conocida de los estados de Nayarit, Jalisco y Michoacán y se le compara con Liparis greenwoodiana Espejo, su congénere más cercano. Las principales diferencias entre las dos especies se encuentran en la forma del labelo.

Acta Botanica Mexicana, 1995

Se propone como especie nueva Kreodanthus casillasii. Se presenta un cuadro para compararla con K... more Se propone como especie nueva Kreodanthus casillasii. Se presenta un cuadro para compararla con K. secundus (Ames) Garay y K. ovatilabius (Ames et Correll) Garay, siendo esta última su pariente más cercano.

Practice Innovations, 2016

Suicide is an often-overlooked manifestation of violence among African American youth that has be... more Suicide is an often-overlooked manifestation of violence among African American youth that has become more prevalent in the last two decades. This article reports on the process used to culturally adapt a cognitive-behavioral coping with stress prevention intervention for African American adolescents. We implemented this adapted school-based suicide prevention intervention with 758 African American 9 th, 10 th and 11 th grade students at four high schools in a large Midwestern city. The findings presented are preliminary. The adolescents in this sample endorsed high levels of suicide risk, with females endorsing significantly more suicide risk than males. Those receiving the prevention intervention evidenced an 86% relative suicide risk reduction, compared to the standard care control participants. The presented model of adaptation and resulting culturally-grounded suicide prevention intervention significantly reduced suicide risk among African American adolescents. Clinical, research and policy implications are discussed.

American journal of community psychology, Jun 1, 2016

African-American adolescents exposed to neighborhood disadvantage are at increased risk for engag... more African-American adolescents exposed to neighborhood disadvantage are at increased risk for engaging in problem behavior and academic underachievement. It is critical to identify the mechanisms that reduce problem behavior and promote better academic outcomes in this population. Based on social disorganization and socioecological theories, the current prospective study examined pathways from parental monitoring to academic outcomes via externalizing behavior at different levels of neighborhood disadvantage. A moderated mediation model employing maximum likelihood was conducted on 339 African-American students from 9th to 11th grade (49.3% females) with a mean age of 14.8 years (SD ± 0.35). The results indicated that parental monitoring predicted low externalizing behavior, and low externalizing behavior predicted better academic outcomes after controlling for externalizing behavior in 9th grade, intervention status, and gender. Mediation was supported, as the index of mediation was ...

Ibugana Boletin Del Instituto De Botanica, 2007

Criminal Justice Policy Review, 2016

The current study examined whether current community supervision status was associated with diffe... more The current study examined whether current community supervision status was associated with differences in demographic characteristics, lifetime substance use patterns, and criminal history among a sample of formerly incarcerated individuals with a history of substance use problems. Results of multivariate analyses revealed participants on community supervision were more likely to have graduated from high school or earned a GED (OR = 1.60; 95% CI [0.15, 17.24]) and were less likely to have a history of psychiatric hospitalization (OR = .88; 95% CI = [0.08, 9.35]). These characteristics may be proxies for social and emotional functioning that influence eligibility for community supervision. Despite these apparent advantages, the community supervision group did not significantly differ from the formerly incarcerated group without current justice involvement on lifetime substance use patterns or criminal history, suggesting formerly incarcerated individuals with substance use disorders may require more intensive interventions to promote existing strengths.

Revista Cubana De Investigaciones Biomedicas, Dec 1, 2013

En México el síndrome metabólico afecta a más del 25 % de la población, lo cual se atribuye a la ... more En México el síndrome metabólico afecta a más del 25 % de la población, lo cual se atribuye a la combinación de factores genéticos y ambientales.

Polish Botanical Journal, 2001

A new species of the genus Deiregyne - D. cochleata Szlach., Tamayo & Rutk. - is described, i... more A new species of the genus Deiregyne - D. cochleata Szlach., Tamayo & Rutk. - is described, illustrated and compared with the closely related D. ramentacea (Lindl.) Schltr.

Introducción Las enfermedades cardiovasculares representan la primera causa de morbimortalidad, d... more Introducción Las enfermedades cardiovasculares representan la primera causa de morbimortalidad, de demanda de atención médica y hospitalización en la edad adulta. Objetivos Analizar las características clínico-epidemiológicas de los pacientes ingresados con el diagnóstico de angina inestable en la Unidad Coronaria del Hospital Militar Central "Dr. Carlos J. Finlay". Métodos Se realizó un estudio descriptivo, transversal y retrospectivo a 606 pacientes ingresados con Angina Inestable desde octubre de 2008 a febrero de 2011. Se revisaron las historias clínicas de estos pacientes, previa consulta del modelo estadístico de la unidad coronaria, donde se registran todos los pacientes internados y sus diagnósticos. Se analizaron variables demográficas, antecedentes cardiovasculares previos, factores de riesgo coronarios, diagnóstico al ingreso, exámenes realizados, tratamiento utilizado, estadía hospitalaria y estado al egreso. Resultados La edad media fue 65,74 ± 11,40 años, predominando el sexo masculino (52,6%). Los principales factores de riesgo: hipertensión arterial, tabaquismo y el infarto previo. Las formas clínicas más frecuentes incluyeron la angina de empeoramiento progresivo (49,2%) y la angina de reposo (22,9%). En el electrocardiograma al ingreso, 35,8% de los pacientes no tuvieron cambios eléctricos, y el 28,7% presentó inversión de la onda T. Se realizó coronariografía al 30,5% de los pacientes, encontrándose lesiones significativas en el 84,9% de ellos. Los medicamentos utilizados con mayor frecuencia fueron los nitratos orales, beta-bloqueadores, heparinas y aspirina. Siete pacientes fallecieron durante el ingreso (1,2%). Conclusiones Las variables demográficas, clínicas, de tratamiento y mortalidad de nuestra población fueron similares a las reportadas en los registros internacionales. Palabras clave: Angina inestable, cardiopatía isquémica, factores de riesgo.

Tamayorkis Szlach. (Malaxideae, Epidendroideae, Orchidaceae) is redefined and three additional sp... more Tamayorkis Szlach. (Malaxideae, Epidendroideae, Orchidaceae) is redefined and three additional species, T. ehrenbergii (Rchb.f.) R. Gonzalez & Szlach., T. hintonii (Todzia) R. Gonzalez & Szlach. and T. wendtii (Salazar) R. Gonzalez & Szlach. are incorporated into it. Tamayorkis is compared with Malaxis Solander ex O. Swartz and Liparis L. C. Richard, to which it is closely related.

Journal of Ethnicity in Substance Abuse, 2013

The current study compared traditional recovery homes for individuals with substance use disorder... more The current study compared traditional recovery homes for individuals with substance use disorders to ones that had been modified to feature culturally-congruent communication styles. Findings indicated significant increases in employment income, with the size of the change significantly greater in the culturally-modified houses. Significant decreases in alcohol use over time were also found, with larger decreases over time in the traditional recovery homes. Use of prescribed medications as well as days using drugs significantly decreased over time, but not differentially for those in the two types of recovery homes. The implications of these findings are discussed. The size of the Latino population in the U.S. and projections for its growth require that substance abuse researchers pay increasing attention to the prevalence and treatment of alcohol abuse among this group (Alvarez, Jason, Olson, Ferrari, & Davis, 2007). National surveys indicate that this group has higher rates of substance-related problems (Caetano, 2003). Despite this risk, this segment of the U.S. population has less access to substance abuse treatment (Tighe & Saxe, 2006), reports less satisfaction with substance abuse interventions, and leaves treatment prematurely (Hser, Huang et al., 2004; White, Winn, & Requests for reprints should be sent to Leonard A

Journal of Child & Adolescent Trauma, 2022

Rareza y estado de conservación de especies arbóreas del bosque mesófilo de montaña en la

Disparities in access and utilization of substance abuse treatment (SAT) among Latinxs, accentuat... more Disparities in access and utilization of substance abuse treatment (SAT) among Latinxs, accentuated by this population's rapid growth, create a public health issue. Although substance abuse literature has given more consideration to environmental factors and social support concerning treatment outcomes, current substance abuse models fail to address important contextual and cultural aspects for Latinxs in recovery, including acculturation. The proposed study aims to test out a multidimensional acculturation model on a sample of 131 Latinxs (Mage= 36.3; SD±10.4, 117 males, 49% immigrants) who recently completed SAT. Specifically, the proposed study employed a conditional process model using the PROCESS Macro for SPSS to examine the association between behavioral acculturation and substance use behavior in the past six months on nativity status at different levels of attitudinal acculturation. Results yielded that, after controlling for age and substance use, higher endorsement of...

Polish Botanical Journal, 2001

A new genus Pachygenium (Schlecht.) Szlach., Tamayo & Rutk. (Orchidaceae, Cyclopogoninae) is prop... more A new genus Pachygenium (Schlecht.) Szlach., Tamayo & Rutk. (Orchidaceae, Cyclopogoninae) is proposed. It differs from the closely related Pelexia Poit. ex Lindl. in its saccate spur and the basal part of the lateral sepals, the strongly incurved lower part of the lip, the truncate apex of the stigma, and massive rostellum and viscidium. 38 new combinations are validated.

Introduction: Metabolic syndrome affects more than 25% of the Mexican population. This is attribu... more Introduction: Metabolic syndrome affects more than 25% of the Mexican population. This is attributable to a combination of genetic and environmental factors. Objective: Determine the prevalence of risk factors of metabolic syndrome in a sample of students from Pablo Guardado Chávez University in the city of Tuxtla Gutiérrez, Chiapas, Mexico. Methods: A descriptive cross-sectional study was conducted of 190 students (99 female and 91 male) aged 17-28. Anthropometric measurements were taken: body mass index and waist circumference. Determination was made of blood pressure, heart rate, and levels of serum cholesterol, triglycerides and glucose. Results: Nine students were diagnosed with metabolic syndrome based on ATP-III criteria. The most common risk factors of metabolic syndrome were android obesity, hyperglycemia, hypertriglyceridemia, hypercholesterolemia and hypertension. Of the sample studied, 51 % presented risk factors of metabolic syndrome. 35.26 % were overweight and 15.80 %...

Disparities in access and utilization of substance abuse treatment (SAT) among Latinas/os, accent... more Disparities in access and utilization of substance abuse treatment (SAT) among Latinas/os, accentuated by the rapid growth of this population are creating a public health issue. Among those in need of SAT, only 7.7% receive treatment and nearly half of these individuals complete SAT or continue their recovery in a controlled environment. Additionally, Latinas/os who complete SAT reported their needs were not met in treatment. Although substance abuse literature has given more consideration to environmental factors and social support in relation to treatment outcomes, current substance abuse models fail to address important contextual and cultural aspects for Latinas/os in recovery. The inclusion of acculturation in substance abuse models is needed to further our understanding of the socio cultural and contextual factors implicated in the recovery process among Latinas/os. Research that examines acculturation theories using a critical lens is needed to expand current notions of accul...

Journal of the American Academy of Child & Adolescent Psychiatry, 2021

Public health (Fairfax, Va.), 2016

The significant research gap on Latino adults who completed substance abuse treatment (SAT) impac... more The significant research gap on Latino adults who completed substance abuse treatment (SAT) impacts the provision of substance use prevention and treatment for this population. Given the need for culturally-appropriate SAT for Latinos, research that examines the role of cultural constructs and acculturation in relation to substance use behavior is warranted. The purpose of the present study is to test, based on the social control theory, a multiple moderation model using the PROCESS macro(1) to examine the moderating effect of Familismo on the association between history of family conflict and years of substance abuse on Latino males who completed SAT at different levels of acculturation (i.e., cultural orientation). Generational status (i.e., immigrant, U. S. born) and age are used as covariates. A total of 117 Latino male participants (Mage= 37, 54% non-U.S. born with a mean length of stay of 19 years in the U.S.) who completed SAT from facilities located in the metropolitan area ...

Acta Botanica Mexicana, 1993

Se propone como especie nueva Liparis volcanica, conocida de los estados de Nayarit, Jalisco y Mi... more Se propone como especie nueva Liparis volcanica, conocida de los estados de Nayarit, Jalisco y Michoacán y se le compara con Liparis greenwoodiana Espejo, su congénere más cercano. Las principales diferencias entre las dos especies se encuentran en la forma del labelo.

Acta Botanica Mexicana, 1995

Se propone como especie nueva Kreodanthus casillasii. Se presenta un cuadro para compararla con K... more Se propone como especie nueva Kreodanthus casillasii. Se presenta un cuadro para compararla con K. secundus (Ames) Garay y K. ovatilabius (Ames et Correll) Garay, siendo esta última su pariente más cercano.

Practice Innovations, 2016

Suicide is an often-overlooked manifestation of violence among African American youth that has be... more Suicide is an often-overlooked manifestation of violence among African American youth that has become more prevalent in the last two decades. This article reports on the process used to culturally adapt a cognitive-behavioral coping with stress prevention intervention for African American adolescents. We implemented this adapted school-based suicide prevention intervention with 758 African American 9 th, 10 th and 11 th grade students at four high schools in a large Midwestern city. The findings presented are preliminary. The adolescents in this sample endorsed high levels of suicide risk, with females endorsing significantly more suicide risk than males. Those receiving the prevention intervention evidenced an 86% relative suicide risk reduction, compared to the standard care control participants. The presented model of adaptation and resulting culturally-grounded suicide prevention intervention significantly reduced suicide risk among African American adolescents. Clinical, research and policy implications are discussed.

American journal of community psychology, Jun 1, 2016

African-American adolescents exposed to neighborhood disadvantage are at increased risk for engag... more African-American adolescents exposed to neighborhood disadvantage are at increased risk for engaging in problem behavior and academic underachievement. It is critical to identify the mechanisms that reduce problem behavior and promote better academic outcomes in this population. Based on social disorganization and socioecological theories, the current prospective study examined pathways from parental monitoring to academic outcomes via externalizing behavior at different levels of neighborhood disadvantage. A moderated mediation model employing maximum likelihood was conducted on 339 African-American students from 9th to 11th grade (49.3% females) with a mean age of 14.8 years (SD ± 0.35). The results indicated that parental monitoring predicted low externalizing behavior, and low externalizing behavior predicted better academic outcomes after controlling for externalizing behavior in 9th grade, intervention status, and gender. Mediation was supported, as the index of mediation was ...

Ibugana Boletin Del Instituto De Botanica, 2007

Criminal Justice Policy Review, 2016

The current study examined whether current community supervision status was associated with diffe... more The current study examined whether current community supervision status was associated with differences in demographic characteristics, lifetime substance use patterns, and criminal history among a sample of formerly incarcerated individuals with a history of substance use problems. Results of multivariate analyses revealed participants on community supervision were more likely to have graduated from high school or earned a GED (OR = 1.60; 95% CI [0.15, 17.24]) and were less likely to have a history of psychiatric hospitalization (OR = .88; 95% CI = [0.08, 9.35]). These characteristics may be proxies for social and emotional functioning that influence eligibility for community supervision. Despite these apparent advantages, the community supervision group did not significantly differ from the formerly incarcerated group without current justice involvement on lifetime substance use patterns or criminal history, suggesting formerly incarcerated individuals with substance use disorders may require more intensive interventions to promote existing strengths.

Revista Cubana De Investigaciones Biomedicas, Dec 1, 2013

En México el síndrome metabólico afecta a más del 25 % de la población, lo cual se atribuye a la ... more En México el síndrome metabólico afecta a más del 25 % de la población, lo cual se atribuye a la combinación de factores genéticos y ambientales.

Polish Botanical Journal, 2001

A new species of the genus Deiregyne - D. cochleata Szlach., Tamayo & Rutk. - is described, i... more A new species of the genus Deiregyne - D. cochleata Szlach., Tamayo & Rutk. - is described, illustrated and compared with the closely related D. ramentacea (Lindl.) Schltr.

Introducción Las enfermedades cardiovasculares representan la primera causa de morbimortalidad, d... more Introducción Las enfermedades cardiovasculares representan la primera causa de morbimortalidad, de demanda de atención médica y hospitalización en la edad adulta. Objetivos Analizar las características clínico-epidemiológicas de los pacientes ingresados con el diagnóstico de angina inestable en la Unidad Coronaria del Hospital Militar Central "Dr. Carlos J. Finlay". Métodos Se realizó un estudio descriptivo, transversal y retrospectivo a 606 pacientes ingresados con Angina Inestable desde octubre de 2008 a febrero de 2011. Se revisaron las historias clínicas de estos pacientes, previa consulta del modelo estadístico de la unidad coronaria, donde se registran todos los pacientes internados y sus diagnósticos. Se analizaron variables demográficas, antecedentes cardiovasculares previos, factores de riesgo coronarios, diagnóstico al ingreso, exámenes realizados, tratamiento utilizado, estadía hospitalaria y estado al egreso. Resultados La edad media fue 65,74 ± 11,40 años, predominando el sexo masculino (52,6%). Los principales factores de riesgo: hipertensión arterial, tabaquismo y el infarto previo. Las formas clínicas más frecuentes incluyeron la angina de empeoramiento progresivo (49,2%) y la angina de reposo (22,9%). En el electrocardiograma al ingreso, 35,8% de los pacientes no tuvieron cambios eléctricos, y el 28,7% presentó inversión de la onda T. Se realizó coronariografía al 30,5% de los pacientes, encontrándose lesiones significativas en el 84,9% de ellos. Los medicamentos utilizados con mayor frecuencia fueron los nitratos orales, beta-bloqueadores, heparinas y aspirina. Siete pacientes fallecieron durante el ingreso (1,2%). Conclusiones Las variables demográficas, clínicas, de tratamiento y mortalidad de nuestra población fueron similares a las reportadas en los registros internacionales. Palabras clave: Angina inestable, cardiopatía isquémica, factores de riesgo.

Tamayorkis Szlach. (Malaxideae, Epidendroideae, Orchidaceae) is redefined and three additional sp... more Tamayorkis Szlach. (Malaxideae, Epidendroideae, Orchidaceae) is redefined and three additional species, T. ehrenbergii (Rchb.f.) R. Gonzalez & Szlach., T. hintonii (Todzia) R. Gonzalez & Szlach. and T. wendtii (Salazar) R. Gonzalez & Szlach. are incorporated into it. Tamayorkis is compared with Malaxis Solander ex O. Swartz and Liparis L. C. Richard, to which it is closely related.

Journal of Ethnicity in Substance Abuse, 2013

The current study compared traditional recovery homes for individuals with substance use disorder... more The current study compared traditional recovery homes for individuals with substance use disorders to ones that had been modified to feature culturally-congruent communication styles. Findings indicated significant increases in employment income, with the size of the change significantly greater in the culturally-modified houses. Significant decreases in alcohol use over time were also found, with larger decreases over time in the traditional recovery homes. Use of prescribed medications as well as days using drugs significantly decreased over time, but not differentially for those in the two types of recovery homes. The implications of these findings are discussed. The size of the Latino population in the U.S. and projections for its growth require that substance abuse researchers pay increasing attention to the prevalence and treatment of alcohol abuse among this group (Alvarez, Jason, Olson, Ferrari, & Davis, 2007). National surveys indicate that this group has higher rates of substance-related problems (Caetano, 2003). Despite this risk, this segment of the U.S. population has less access to substance abuse treatment (Tighe & Saxe, 2006), reports less satisfaction with substance abuse interventions, and leaves treatment prematurely (Hser, Huang et al., 2004; White, Winn, & Requests for reprints should be sent to Leonard A