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Papers by Daniel Tancredi

Research paper thumbnail of Gastrointestinal Medical History Interview

Research paper thumbnail of Region of Birth, Sex, and Reproductive Health in Rural Immigrant Latino Farmworkers: The MICASA Study

Research paper thumbnail of Agricultural work exposures and pulmonary function among hired farm workers in California (the MICASA study)

Despite California&am... more Despite California's dependence on hired farm labor, scarce research has been conducted on the respiratory health of hired farm workers. Agricultural exposures to inorganic and organic dusts can adversely affect an individual's respiratory health and differ by farm type and job task. The purpose of the present analysis was to examine associations between agricultural work exposures and pulmonary function among 450 California farm workers. Data were collected as part of the Mexican Immigration to California: Agricultural Safety and Acculturation (MICASA) study, a prospective cohort study examining occupational risk factors and health of hired farm worker families in Mendota, California. Time-weighted self-reported average (TWSRA) dust scores were calculated from assessments of past-12-month agricultural work history. Other dust exposure indicator variables included months worked in agriculture in the past 12 months and years worked in agriculture. Multiple linear regression modeled FEV1 (forced expiratory volume in 1 second), FEF(25-75%) (forced midexpiratory flow rate), FVC (forced vital capacity), FEV6, FEV1/FVC, and FEV1/FEV6 separately. Seventy-six percent of participants had worked in agriculture in the past year. In models conducted for crops and tasks separately, high TWSRA dust score was associated with better FEV6. Crop and task models showed associations between greater months worked in agriculture in the past year and better FEV1, FEF(25-75%), and FEV6. Both models also found greater years worked in agriculture to be associated with worse FEV1/FEV6. Results were generally in the opposite direction as expected given past research but not uncommon. Future research should investigate relationships between pulmonary function and agricultural dust exposure over a lifetime and changes in pulmonary function over time.

Research paper thumbnail of Correlates of Fruit and Vegetable Intake and Fat Consumption in a Latino Farm Worker Community in Central California

Research paper thumbnail of Acculturation-Related Predictors of Very Light Smoking Among Latinos in California and Nationwide

Research paper thumbnail of Garcia 2013 A Survey of PM on CA Dairy Farms

Research paper thumbnail of Clinical practice and variation in care for childhood obesity at seven clinics in California

Quality in primary care, 2012

The Healthy Eating Active Living TeleHealth Community of Practice is a virtual quality-improvemen... more The Healthy Eating Active Living TeleHealth Community of Practice is a virtual quality-improvement learning network of seven rural clinics in California. The goal of this network is to improve childhood obesity prevention and management practices at participating clinics. Our objective is to describe clinical practices regarding weight assessment and nutrition and physical activity counselling at participating clinics before implementation of the quality improvement intervention. Participants were 2-11 year old children seen for well-child care in 2010. Telephone surveys of English and Spanish-speaking parents were conducted within three days of their child's well-child visit to determine the content of counselling during the visit regarding nutrition and physical activity. Medical record reviews were conducted to determine clinicians' assessment of weight status. Twenty-seven clinicians conducted 144 well-child visits included in the study. Body mass index (BMI) was documen...

Research paper thumbnail of 131. Coaching Boys into Men: Preliminary Success of a Sexual Violence Prevention Program

[Research paper thumbnail of Response to \Adding socioeconomic status to Framingham scoring might also improve stroke risk evaluation in young adults with hypertension](https://attachments.academia-assets.com/46138968/thumbnails/1.jpg)

Research paper thumbnail of Cholesterol treatment with statins: Who is left out and who makes it to goal?

Research paper thumbnail of Application of patient safety indicators internationally: a pilot study among seven countries

Research paper thumbnail of Serum concentrations of perfluorinated compounds (PFC) among selected populations of children and adults in California

Environmental research, 2015

Perfluorinated compounds (PFCs) have been widely used in industrial applications and consumer pro... more Perfluorinated compounds (PFCs) have been widely used in industrial applications and consumer products. Their persistent nature and potential health impacts are of concern. Given the high cost of collecting serum samples, this study is to understand whether we can quantify PFC serum concentrations using factors extracted from questionnaire responses and indirect measurements, and whether a single serum measurement can be used to classify an individual's exposure over a one-year period. The study population included three demographic groups: young children (2-8 years old) (N=67), parents of young children (<55 years old) (N=90), and older adults (>55 years old) (N=59). PFC serum concentrations, house dust concentrations, and questionnaires were collected. The geometric mean of perfluorooctane sulfonic acid (PFOS) was highest for the older adults. In contrast, the geometric mean of perfluorooctanoic acid (PFOA) was highest for children. Serum concentrations of the parent and...

Research paper thumbnail of Cyber dating abuse among teens using school-based health centers

Pediatrics, 2014

To estimate the prevalence of cyber dating abuse among youth aged 14 to 19 years seeking care at ... more To estimate the prevalence of cyber dating abuse among youth aged 14 to 19 years seeking care at school-based health centers and associations with other forms of adolescent relationship abuse (ARA), sexual violence, and reproductive and sexual health indicators. A cross-sectional survey was conducted during the 2012-2013 school year (participant n = 1008). Associations between cyber dating abuse and study outcomes were assessed via logistic regression models for clustered survey data. Past 3-month cyber dating abuse was reported by 41.4% of this clinic-based sample. More female than male participants reported cyber dating abuse victimization (44.6% vs 31.0%). Compared with no exposure, low- ("a few times") and high-frequency ("once or twice a month" or more) cyber dating abuse were significantly associated with physical or sexual ARA (low: adjusted odds ratio [aOR] 2.8, 95% confidence interval [CI] 1.8-4.4; high: aOR 5.4, 95% CI 4.0-7.5) and nonpartner sexual ass...

Research paper thumbnail of Lactobacillus reuteri DSM 17938 for managing infant colic: protocol for an individual participant data meta-analysis

BMJ open, 2014

Infant colic, or excessive crying of unknown cause in infants less than 3 months old, is common a... more Infant colic, or excessive crying of unknown cause in infants less than 3 months old, is common and burdensome. Its aetiology is undetermined, and consensus on its management is still lacking. Recent studies suggest a possible link between infant colic and gut microbiota, indicating probiotics to be a promising treatment. However, only a few strains have been tested, and results from randomised controlled trials are conflicting. It is important to clarify whether probiotics are effective for treating infant colic in general, and to identify whether certain subgroups of infants with colic would benefit from particular strains of probiotics. Through an individual participant data meta-analysis (IPDMA), we aim to identify whether the probiotic Lactobacillus reuteri DSM 17938 is effective in the management of infant colic, and to clarify whether its effects differ according to feeding method (breast vs formula vs combined), proton pump inhibitor exposure, and antibiotic exposure. The pr...

Research paper thumbnail of Arthritis, occupational class, and the aging US workforce

Research paper thumbnail of A School Health Center Intervention for Abusive Adolescent Relationships: A Cluster RCT

Research paper thumbnail of Mexican immigration to the US and alcohol and drug use opportunities: Does it make a difference in alcohol and/or drug use?

Research paper thumbnail of Mexican immigration to the US and alcohol and drug use opportunities: Does it make a differente in alcohol and/or drug use?

Research paper thumbnail of Mexican immigration to the US, the occurrence of violence and the impact of mental disorders

Research paper thumbnail of Methods for assessing patient-clinician communication about depression in primary care: what you see depends on how you look

To advance research on depression communication and treatment by comparing assessments of communi... more To advance research on depression communication and treatment by comparing assessments of communication about depression from patient report, clinician report, and chart review to assessments from transcripts. One hundred sixty-four primary care visits from seven health care systems (2010-2011). Presence or absence of discussion about depressive symptoms, treatment recommendations, and follow-up was measured using patient and clinician postvisit questionnaires, chart review, and coding of audio transcripts. Sensitivity and specificity of indirect measures compared to transcripts were calculated. Patient report was sensitive for mood (83 percent) and sleep (83 percent) but not suicide (55 percent). Patient report was specific for suicide (86 percent) but not for other symptoms (44-75 percent). Clinician report was sensitive for all symptoms (83-98 percent) and specific for sleep, memory, and suicide (80-87 percent), but not for other symptoms (45-48 percent). Chart review was not sensitive for symptoms (50-73 percent), but it was specific for sleep, memory, and suicide (88-96 percent). All indirect measures had low sensitivity for treatment recommendations (patient report: 24-42 percent, clinician report 38-50 percent, chart review 49-67 percent) but high specificity (89-96 percent). For definite follow-up plans, all three indirect measures were sensitive (82-96 percent) but not specific (40-57 percent). Clinician report and chart review generally had the most favorable sensitivity and specificity for measuring discussion of depressive symptoms and treatment recommendations, respectively.

Research paper thumbnail of Gastrointestinal Medical History Interview

Research paper thumbnail of Region of Birth, Sex, and Reproductive Health in Rural Immigrant Latino Farmworkers: The MICASA Study

Research paper thumbnail of Agricultural work exposures and pulmonary function among hired farm workers in California (the MICASA study)

Despite California&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;am... more Despite California&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s dependence on hired farm labor, scarce research has been conducted on the respiratory health of hired farm workers. Agricultural exposures to inorganic and organic dusts can adversely affect an individual&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s respiratory health and differ by farm type and job task. The purpose of the present analysis was to examine associations between agricultural work exposures and pulmonary function among 450 California farm workers. Data were collected as part of the Mexican Immigration to California: Agricultural Safety and Acculturation (MICASA) study, a prospective cohort study examining occupational risk factors and health of hired farm worker families in Mendota, California. Time-weighted self-reported average (TWSRA) dust scores were calculated from assessments of past-12-month agricultural work history. Other dust exposure indicator variables included months worked in agriculture in the past 12 months and years worked in agriculture. Multiple linear regression modeled FEV1 (forced expiratory volume in 1 second), FEF(25-75%) (forced midexpiratory flow rate), FVC (forced vital capacity), FEV6, FEV1/FVC, and FEV1/FEV6 separately. Seventy-six percent of participants had worked in agriculture in the past year. In models conducted for crops and tasks separately, high TWSRA dust score was associated with better FEV6. Crop and task models showed associations between greater months worked in agriculture in the past year and better FEV1, FEF(25-75%), and FEV6. Both models also found greater years worked in agriculture to be associated with worse FEV1/FEV6. Results were generally in the opposite direction as expected given past research but not uncommon. Future research should investigate relationships between pulmonary function and agricultural dust exposure over a lifetime and changes in pulmonary function over time.

Research paper thumbnail of Correlates of Fruit and Vegetable Intake and Fat Consumption in a Latino Farm Worker Community in Central California

Research paper thumbnail of Acculturation-Related Predictors of Very Light Smoking Among Latinos in California and Nationwide

Research paper thumbnail of Garcia 2013 A Survey of PM on CA Dairy Farms

Research paper thumbnail of Clinical practice and variation in care for childhood obesity at seven clinics in California

Quality in primary care, 2012

The Healthy Eating Active Living TeleHealth Community of Practice is a virtual quality-improvemen... more The Healthy Eating Active Living TeleHealth Community of Practice is a virtual quality-improvement learning network of seven rural clinics in California. The goal of this network is to improve childhood obesity prevention and management practices at participating clinics. Our objective is to describe clinical practices regarding weight assessment and nutrition and physical activity counselling at participating clinics before implementation of the quality improvement intervention. Participants were 2-11 year old children seen for well-child care in 2010. Telephone surveys of English and Spanish-speaking parents were conducted within three days of their child's well-child visit to determine the content of counselling during the visit regarding nutrition and physical activity. Medical record reviews were conducted to determine clinicians' assessment of weight status. Twenty-seven clinicians conducted 144 well-child visits included in the study. Body mass index (BMI) was documen...

Research paper thumbnail of 131. Coaching Boys into Men: Preliminary Success of a Sexual Violence Prevention Program

[Research paper thumbnail of Response to \Adding socioeconomic status to Framingham scoring might also improve stroke risk evaluation in young adults with hypertension](https://attachments.academia-assets.com/46138968/thumbnails/1.jpg)

Research paper thumbnail of Cholesterol treatment with statins: Who is left out and who makes it to goal?

Research paper thumbnail of Application of patient safety indicators internationally: a pilot study among seven countries

Research paper thumbnail of Serum concentrations of perfluorinated compounds (PFC) among selected populations of children and adults in California

Environmental research, 2015

Perfluorinated compounds (PFCs) have been widely used in industrial applications and consumer pro... more Perfluorinated compounds (PFCs) have been widely used in industrial applications and consumer products. Their persistent nature and potential health impacts are of concern. Given the high cost of collecting serum samples, this study is to understand whether we can quantify PFC serum concentrations using factors extracted from questionnaire responses and indirect measurements, and whether a single serum measurement can be used to classify an individual's exposure over a one-year period. The study population included three demographic groups: young children (2-8 years old) (N=67), parents of young children (<55 years old) (N=90), and older adults (>55 years old) (N=59). PFC serum concentrations, house dust concentrations, and questionnaires were collected. The geometric mean of perfluorooctane sulfonic acid (PFOS) was highest for the older adults. In contrast, the geometric mean of perfluorooctanoic acid (PFOA) was highest for children. Serum concentrations of the parent and...

Research paper thumbnail of Cyber dating abuse among teens using school-based health centers

Pediatrics, 2014

To estimate the prevalence of cyber dating abuse among youth aged 14 to 19 years seeking care at ... more To estimate the prevalence of cyber dating abuse among youth aged 14 to 19 years seeking care at school-based health centers and associations with other forms of adolescent relationship abuse (ARA), sexual violence, and reproductive and sexual health indicators. A cross-sectional survey was conducted during the 2012-2013 school year (participant n = 1008). Associations between cyber dating abuse and study outcomes were assessed via logistic regression models for clustered survey data. Past 3-month cyber dating abuse was reported by 41.4% of this clinic-based sample. More female than male participants reported cyber dating abuse victimization (44.6% vs 31.0%). Compared with no exposure, low- ("a few times") and high-frequency ("once or twice a month" or more) cyber dating abuse were significantly associated with physical or sexual ARA (low: adjusted odds ratio [aOR] 2.8, 95% confidence interval [CI] 1.8-4.4; high: aOR 5.4, 95% CI 4.0-7.5) and nonpartner sexual ass...

Research paper thumbnail of Lactobacillus reuteri DSM 17938 for managing infant colic: protocol for an individual participant data meta-analysis

BMJ open, 2014

Infant colic, or excessive crying of unknown cause in infants less than 3 months old, is common a... more Infant colic, or excessive crying of unknown cause in infants less than 3 months old, is common and burdensome. Its aetiology is undetermined, and consensus on its management is still lacking. Recent studies suggest a possible link between infant colic and gut microbiota, indicating probiotics to be a promising treatment. However, only a few strains have been tested, and results from randomised controlled trials are conflicting. It is important to clarify whether probiotics are effective for treating infant colic in general, and to identify whether certain subgroups of infants with colic would benefit from particular strains of probiotics. Through an individual participant data meta-analysis (IPDMA), we aim to identify whether the probiotic Lactobacillus reuteri DSM 17938 is effective in the management of infant colic, and to clarify whether its effects differ according to feeding method (breast vs formula vs combined), proton pump inhibitor exposure, and antibiotic exposure. The pr...

Research paper thumbnail of Arthritis, occupational class, and the aging US workforce

Research paper thumbnail of A School Health Center Intervention for Abusive Adolescent Relationships: A Cluster RCT

Research paper thumbnail of Mexican immigration to the US and alcohol and drug use opportunities: Does it make a difference in alcohol and/or drug use?

Research paper thumbnail of Mexican immigration to the US and alcohol and drug use opportunities: Does it make a differente in alcohol and/or drug use?

Research paper thumbnail of Mexican immigration to the US, the occurrence of violence and the impact of mental disorders

Research paper thumbnail of Methods for assessing patient-clinician communication about depression in primary care: what you see depends on how you look

To advance research on depression communication and treatment by comparing assessments of communi... more To advance research on depression communication and treatment by comparing assessments of communication about depression from patient report, clinician report, and chart review to assessments from transcripts. One hundred sixty-four primary care visits from seven health care systems (2010-2011). Presence or absence of discussion about depressive symptoms, treatment recommendations, and follow-up was measured using patient and clinician postvisit questionnaires, chart review, and coding of audio transcripts. Sensitivity and specificity of indirect measures compared to transcripts were calculated. Patient report was sensitive for mood (83 percent) and sleep (83 percent) but not suicide (55 percent). Patient report was specific for suicide (86 percent) but not for other symptoms (44-75 percent). Clinician report was sensitive for all symptoms (83-98 percent) and specific for sleep, memory, and suicide (80-87 percent), but not for other symptoms (45-48 percent). Chart review was not sensitive for symptoms (50-73 percent), but it was specific for sleep, memory, and suicide (88-96 percent). All indirect measures had low sensitivity for treatment recommendations (patient report: 24-42 percent, clinician report 38-50 percent, chart review 49-67 percent) but high specificity (89-96 percent). For definite follow-up plans, all three indirect measures were sensitive (82-96 percent) but not specific (40-57 percent). Clinician report and chart review generally had the most favorable sensitivity and specificity for measuring discussion of depressive symptoms and treatment recommendations, respectively.