Willem Jan van der Veen (original) (raw)
Papers by Willem Jan van der Veen
for assessing the quality of asthma prescribing
Nederlands Tijdschrift voor Geneeskunde, 2006
OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and di... more OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histories of rofecoxib users, and the occurrence of cardiac complications during the follow-up. DESIGN: Longitudinal comparative study in family practice. METHOD: Based on the data from family practices (17 family physicians) affiliated with the Registration Network Groningen, a network with about 30,000 patients in the northern part of the Netherlands, the incidence and prevalence ofrofecoxib use were determined per 1000 patients at risk for every quarter during the period 2000-2004. Data on duration, dosage and indications were taken from the rofecoxib prescriptions. Differences in morbidity between rofecoxib users and the users of traditional NSAIDs were compared using logistic regression, and differences between the two groups in the occurrence of cardiac complications were assessed by means of Cox regression analysis. RESULTS: During the period investigated, rofecoxib was pres...
Nederlands tijdschrift voor geneeskunde, Jan 6, 2006
To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histo... more To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histories of rofecoxib users, and the occurrence of cardiac complications during the follow-up. Longitudinal comparative study in family practice. Based on the data from family practices (17 family physicians) affiliated with the Registration Network Groningen, a network with about 30,000 patients in the northern part of the Netherlands, the incidence and prevalence ofrofecoxib use were determined per 1000 patients at risk for every quarter during the period 2000-2004. Data on duration, dosage and indications were taken from the rofecoxib prescriptions. Differences in morbidity between rofecoxib users and the users of traditional NSAIDs were compared using logistic regression, and differences between the two groups in the occurrence of cardiac complications were assessed by means of Cox regression analysis. During the period investigated, rofecoxib was prescribed with increasing frequency in ...
Huisarts En Wetenschap, 2007
Huisarts En Wetenschap, Jul 1, 2007
Samenvatting Bouwman I, Van der Heide WK, Van der Veen WJ, Van der Meer K. Huisartsen en patiën... more Samenvatting Bouwman I, Van der Heide WK, Van der Veen WJ, Van der Meer K. Huisartsen en patiënten denken bij plasklachten bij oudere mannen nog steeds aan prostaatcarcinoom. Huisarts Wet 2007;50(7):321-5. Inleiding Mictieproblemen komen regelmatig voor bij oudere mannen. Hoewel mictieproblemen zelf reden genoeg zijn om de huisarts advies te vragen, worden ze door patiënten en huisarts ook vaak geassocieerd
Huisarts En Wetenschap, 2003
OBJECTIVE: To obtain information on the frequency of and the indications for prescription of meth... more OBJECTIVE: To obtain information on the frequency of and the indications for prescription of methylphenidate in general practices in the north-east of The Netherlands. DESIGN: Descriptive. METHOD: Data were collected from 1998 to 2003 from 6 general practices in the north-east of The Netherlands (17 general practitioners, approximately 30,000 patients) that were affiliated to the Registration Network in Groningen. The number of new and existing patients who were prescribed methylphenidate was calculated by age group per 1000 person-years per calendar year. The indication on which the drug was prescribed was looked at, as was the number of patients who were referred to a specialist on that indication. RESULTS: The number of new users per 1000 person-years more than doubled from 17 in 1999 to 42 in 2003. In all years studied the highest number of new users fell into the age group 5-9 years. The total number of users per 1000 person-years tripled (boys: 1.8 in 1998 and 6.2 in 2003; gir...
Nederlands tijdschrift voor geneeskunde, Jan 30, 2005
To obtain information on the frequency of and the indications for prescription of methylphenidate... more To obtain information on the frequency of and the indications for prescription of methylphenidate in general practices in the north-east of The Netherlands. Descriptive. Data were collected from 1998 to 2003 from 6 general practices in the north-east of The Netherlands (17 general practitioners, approximately 30,000 patients) that were affiliated to the Registration Network in Groningen. The number of new and existing patients who were prescribed methylphenidate was calculated by age group per 1000 person-years per calendar year. The indication on which the drug was prescribed was looked at, as was the number of patients who were referred to a specialist on that indication. The number of new users per 1000 person-years more than doubled from 17 in 1999 to 42 in 2003. In all years studied the highest number of new users fell into the age group 5-9 years. The total number of users per 1000 person-years tripled (boys: 1.8 in 1998 and 6.2 in 2003; girls: 0.5 in 1998 and 0.8 in 2003). Th...
Huisarts en Wetenschap, 2003
samenvatting Van der Werf G.Th, Groenhof F, Van der Veen WJ. Comorbiditeit en comedicatie bij pa... more samenvatting Van der Werf G.Th, Groenhof F, Van der Veen WJ. Comorbiditeit en comedicatie bij patiënten met boezemfibrilleren. Huisarts Wet 2003;46(14):813-8. Inleiding De context van de patiënt, in termen van comorbiditeit en comedicatie, vormt een belangrijk facet van het huisartsgeneeskundig handelen. Aan de hand van het vóórkomen van boezemfibrilleren (BF) kan dit worden geïllustreerd. Methode Het onderzoek beslaat de periode 1998-2002
Prenatal Diagnosis, 1997
The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) i... more The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) in the context of demographic variation in time and place, using population and fertility data for several European countries. Two screening approaches are distinguished: one on the basis of maternal serum screening with human chorionic gonadotropin (hCG) and alpha-fetoprotein (AFP) in combination with maternal age, and one on the basis of maternal age only. Screening performance, as measured by detection and false-positive ratios, is shown to be the result of the screening approach chosen and of the demographic characteristics of the population under consideration. A proper distinction between these two determinants of DS screening performance should be made, in order to distinguish between an improvement in screening performance that is brought about by a new screening approach and an improvement that is brought about by demographic change. We recommend that measures of DS screening performance be standardized for demographic variation. The methodology and demographic data presented in this article can be used for this purpose.
Pharmacoepidemiology and Drug Safety, 2000
Patient Education and Counseling, 2009
Development and validation of a questionnaire that measures patients&... more Development and validation of a questionnaire that measures patients' experiences of collaboration between general practitioners (GPs) and specialists. A questionnaire was developed using the method of the consumer quality index and validated in a cross-sectional study among a random sample of patients referred to medical specialists in the Netherlands. Validation included factor analysis, ascertain internal consistency, and the discriminative ability. The response rate was 65% (1404 patients). Exploratory factor analysis indicated that four domains could be distinguished (i.e. GP Approach; GP Referral; Specialist; Collaboration). Cronbach's alpha coefficients ranged from 0.51 to 0.93 indicating sufficient internal consistency to make comparison of groups of respondents possible. The Pearson correlation coefficients between the domains were <0.4, except between the domains GP Approach and GP Referral. All domains clearly produced discriminating scores for groups with different characteristics. The Consumer Quality Index (CQ-index) Continuum of Care can be a useful instrument to assess aspects of the collaboration between GPs and specialists from patients' perspective. It can be used to give feedback to both medical professionals and policy makers. Such feedback creates an opportunity for implementing specific improvements and evaluating quality improvement projects.
European Journal of General Practice, 2008
Dungen, C. van den, Hoeymans, N., Gijsen, R., Akker, M. van den, Boesten, J., Brouwer, H., Smeets... more Dungen, C. van den, Hoeymans, N., Gijsen, R., Akker, M. van den, Boesten, J., Brouwer, H., Smeets, H., Veen, W.J. van der, Verheij, R., Waal, M. de, Schellevis, F., Westert, G. What factors explain the differences in morbidity estimations among general practice registrations networks in the Netherlands? A first analysis.
Ageing and Society, 1992
ABSTRACTThis study focuses on the residents of three ecclesiastical homes for the elderly in The ... more ABSTRACTThis study focuses on the residents of three ecclesiastical homes for the elderly in The Hague in the i9th century. These homes took in poor members of the church who were at least 60 years old. Most of the elderly who resided in these homes had received poor relief before their admission. The main reason for their decision to request admission to a home was that they were no longer able to run a household independently. Most of the residents were well past the age of 60 upon entering the home, women generally being a few years older than men. There were no significant gender differences in duration of residence. The female age at death was a few years higher than for males. The health of the residents appeared to be worse than that of the total elderly population of The Hague, resulting in a higher death rate. In general, residents had independently run a household prior to admission.
Prenatal Diag, 1997
The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) i... more The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) in the context of demographic variation in time and place, using population and fertility data for several European countries. Two screening approaches are distinguished: one on the basis of maternal serum screening with human chorionic gonadotropin (hCG) and alpha-fetoprotein (AFP) in combination with maternal age, and one on the basis of maternal age only. Screening performance, as measured by detection and false-positive ratios, is shown to be the result of the screening approach chosen and of the demographic characteristics of the population under consideration. A proper distinction between these two determinants of DS screening performance should be made, in order to distinguish between an improvement in screening performance that is brought about by a new screening approach and an improvement that is brought about by demographic change. We recommend that measures of DS screening performance be standardized for demographic variation. The methodology and demographic data presented in this article can be used for this purpose.
Eur J Pop, 1994
"Regional differentials in life expectancy at birth during the 1980s in Belgium, The Net... more "Regional differentials in life expectancy at birth during the 1980s in Belgium, The Netherlands and some parts of the former Federal Republic of Germany are presented and commented upon. Life expectancy at birth during the 1980s was highest in the Netherlands, and lowest in some parts of southern Belgium. Substantial differentials existed in 1980, particularly because of differential mortality due to diseases of the circulatory system, lung cancer, breast cancer, motor vehicle accidents and suicide. These differentials persisted throughout the 1980s, but gradually converged. Gains in life expectancy were mainly due to declining cardiovascular and cerebrovascular mortality. Sharp and persistent differentials between border regions in the study area point to societal and cultural forces bringing about dividing lines between relatively homogeneous mortality profiles." (SUMMARY IN FRE)
OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and di... more OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histories of rofecoxib users, and the occurrence of cardiac complications during the follow-up. DESIGN: Longitudinal comparative study in family practice. METHOD: Based on the data from family practices (17 family physicians) affiliated with the Registration Network Groningen, a network with about 30,000 patients in the northern part of the Netherlands, the incidence and prevalence ofrofecoxib use were determined per 1000 patients at risk for every quarter during the period 2000-2004. Data on duration, dosage and indications were taken from the rofecoxib prescriptions. Differences in morbidity between rofecoxib users and the users of traditional NSAIDs were compared using logistic regression, and differences between the two groups in the occurrence of cardiac complications were assessed by means of Cox regression analysis. RESULTS: During the period investigated, rofecoxib was pres...
for assessing the quality of asthma prescribing
Nederlands Tijdschrift voor Geneeskunde, 2006
OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and di... more OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histories of rofecoxib users, and the occurrence of cardiac complications during the follow-up. DESIGN: Longitudinal comparative study in family practice. METHOD: Based on the data from family practices (17 family physicians) affiliated with the Registration Network Groningen, a network with about 30,000 patients in the northern part of the Netherlands, the incidence and prevalence ofrofecoxib use were determined per 1000 patients at risk for every quarter during the period 2000-2004. Data on duration, dosage and indications were taken from the rofecoxib prescriptions. Differences in morbidity between rofecoxib users and the users of traditional NSAIDs were compared using logistic regression, and differences between the two groups in the occurrence of cardiac complications were assessed by means of Cox regression analysis. RESULTS: During the period investigated, rofecoxib was pres...
Nederlands tijdschrift voor geneeskunde, Jan 6, 2006
To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histo... more To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histories of rofecoxib users, and the occurrence of cardiac complications during the follow-up. Longitudinal comparative study in family practice. Based on the data from family practices (17 family physicians) affiliated with the Registration Network Groningen, a network with about 30,000 patients in the northern part of the Netherlands, the incidence and prevalence ofrofecoxib use were determined per 1000 patients at risk for every quarter during the period 2000-2004. Data on duration, dosage and indications were taken from the rofecoxib prescriptions. Differences in morbidity between rofecoxib users and the users of traditional NSAIDs were compared using logistic regression, and differences between the two groups in the occurrence of cardiac complications were assessed by means of Cox regression analysis. During the period investigated, rofecoxib was prescribed with increasing frequency in ...
Huisarts En Wetenschap, 2007
Huisarts En Wetenschap, Jul 1, 2007
Samenvatting Bouwman I, Van der Heide WK, Van der Veen WJ, Van der Meer K. Huisartsen en patiën... more Samenvatting Bouwman I, Van der Heide WK, Van der Veen WJ, Van der Meer K. Huisartsen en patiënten denken bij plasklachten bij oudere mannen nog steeds aan prostaatcarcinoom. Huisarts Wet 2007;50(7):321-5. Inleiding Mictieproblemen komen regelmatig voor bij oudere mannen. Hoewel mictieproblemen zelf reden genoeg zijn om de huisarts advies te vragen, worden ze door patiënten en huisarts ook vaak geassocieerd
Huisarts En Wetenschap, 2003
OBJECTIVE: To obtain information on the frequency of and the indications for prescription of meth... more OBJECTIVE: To obtain information on the frequency of and the indications for prescription of methylphenidate in general practices in the north-east of The Netherlands. DESIGN: Descriptive. METHOD: Data were collected from 1998 to 2003 from 6 general practices in the north-east of The Netherlands (17 general practitioners, approximately 30,000 patients) that were affiliated to the Registration Network in Groningen. The number of new and existing patients who were prescribed methylphenidate was calculated by age group per 1000 person-years per calendar year. The indication on which the drug was prescribed was looked at, as was the number of patients who were referred to a specialist on that indication. RESULTS: The number of new users per 1000 person-years more than doubled from 17 in 1999 to 42 in 2003. In all years studied the highest number of new users fell into the age group 5-9 years. The total number of users per 1000 person-years tripled (boys: 1.8 in 1998 and 6.2 in 2003; gir...
Nederlands tijdschrift voor geneeskunde, Jan 30, 2005
To obtain information on the frequency of and the indications for prescription of methylphenidate... more To obtain information on the frequency of and the indications for prescription of methylphenidate in general practices in the north-east of The Netherlands. Descriptive. Data were collected from 1998 to 2003 from 6 general practices in the north-east of The Netherlands (17 general practitioners, approximately 30,000 patients) that were affiliated to the Registration Network in Groningen. The number of new and existing patients who were prescribed methylphenidate was calculated by age group per 1000 person-years per calendar year. The indication on which the drug was prescribed was looked at, as was the number of patients who were referred to a specialist on that indication. The number of new users per 1000 person-years more than doubled from 17 in 1999 to 42 in 2003. In all years studied the highest number of new users fell into the age group 5-9 years. The total number of users per 1000 person-years tripled (boys: 1.8 in 1998 and 6.2 in 2003; girls: 0.5 in 1998 and 0.8 in 2003). Th...
Huisarts en Wetenschap, 2003
samenvatting Van der Werf G.Th, Groenhof F, Van der Veen WJ. Comorbiditeit en comedicatie bij pa... more samenvatting Van der Werf G.Th, Groenhof F, Van der Veen WJ. Comorbiditeit en comedicatie bij patiënten met boezemfibrilleren. Huisarts Wet 2003;46(14):813-8. Inleiding De context van de patiënt, in termen van comorbiditeit en comedicatie, vormt een belangrijk facet van het huisartsgeneeskundig handelen. Aan de hand van het vóórkomen van boezemfibrilleren (BF) kan dit worden geïllustreerd. Methode Het onderzoek beslaat de periode 1998-2002
Prenatal Diagnosis, 1997
The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) i... more The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) in the context of demographic variation in time and place, using population and fertility data for several European countries. Two screening approaches are distinguished: one on the basis of maternal serum screening with human chorionic gonadotropin (hCG) and alpha-fetoprotein (AFP) in combination with maternal age, and one on the basis of maternal age only. Screening performance, as measured by detection and false-positive ratios, is shown to be the result of the screening approach chosen and of the demographic characteristics of the population under consideration. A proper distinction between these two determinants of DS screening performance should be made, in order to distinguish between an improvement in screening performance that is brought about by a new screening approach and an improvement that is brought about by demographic change. We recommend that measures of DS screening performance be standardized for demographic variation. The methodology and demographic data presented in this article can be used for this purpose.
Pharmacoepidemiology and Drug Safety, 2000
Patient Education and Counseling, 2009
Development and validation of a questionnaire that measures patients&... more Development and validation of a questionnaire that measures patients' experiences of collaboration between general practitioners (GPs) and specialists. A questionnaire was developed using the method of the consumer quality index and validated in a cross-sectional study among a random sample of patients referred to medical specialists in the Netherlands. Validation included factor analysis, ascertain internal consistency, and the discriminative ability. The response rate was 65% (1404 patients). Exploratory factor analysis indicated that four domains could be distinguished (i.e. GP Approach; GP Referral; Specialist; Collaboration). Cronbach's alpha coefficients ranged from 0.51 to 0.93 indicating sufficient internal consistency to make comparison of groups of respondents possible. The Pearson correlation coefficients between the domains were <0.4, except between the domains GP Approach and GP Referral. All domains clearly produced discriminating scores for groups with different characteristics. The Consumer Quality Index (CQ-index) Continuum of Care can be a useful instrument to assess aspects of the collaboration between GPs and specialists from patients' perspective. It can be used to give feedback to both medical professionals and policy makers. Such feedback creates an opportunity for implementing specific improvements and evaluating quality improvement projects.
European Journal of General Practice, 2008
Dungen, C. van den, Hoeymans, N., Gijsen, R., Akker, M. van den, Boesten, J., Brouwer, H., Smeets... more Dungen, C. van den, Hoeymans, N., Gijsen, R., Akker, M. van den, Boesten, J., Brouwer, H., Smeets, H., Veen, W.J. van der, Verheij, R., Waal, M. de, Schellevis, F., Westert, G. What factors explain the differences in morbidity estimations among general practice registrations networks in the Netherlands? A first analysis.
Ageing and Society, 1992
ABSTRACTThis study focuses on the residents of three ecclesiastical homes for the elderly in The ... more ABSTRACTThis study focuses on the residents of three ecclesiastical homes for the elderly in The Hague in the i9th century. These homes took in poor members of the church who were at least 60 years old. Most of the elderly who resided in these homes had received poor relief before their admission. The main reason for their decision to request admission to a home was that they were no longer able to run a household independently. Most of the residents were well past the age of 60 upon entering the home, women generally being a few years older than men. There were no significant gender differences in duration of residence. The female age at death was a few years higher than for males. The health of the residents appeared to be worse than that of the total elderly population of The Hague, resulting in a higher death rate. In general, residents had independently run a household prior to admission.
Prenatal Diag, 1997
The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) i... more The aim of this article is to examine the performance of screening for fetal Down syndrome (DS) in the context of demographic variation in time and place, using population and fertility data for several European countries. Two screening approaches are distinguished: one on the basis of maternal serum screening with human chorionic gonadotropin (hCG) and alpha-fetoprotein (AFP) in combination with maternal age, and one on the basis of maternal age only. Screening performance, as measured by detection and false-positive ratios, is shown to be the result of the screening approach chosen and of the demographic characteristics of the population under consideration. A proper distinction between these two determinants of DS screening performance should be made, in order to distinguish between an improvement in screening performance that is brought about by a new screening approach and an improvement that is brought about by demographic change. We recommend that measures of DS screening performance be standardized for demographic variation. The methodology and demographic data presented in this article can be used for this purpose.
Eur J Pop, 1994
"Regional differentials in life expectancy at birth during the 1980s in Belgium, The Net... more "Regional differentials in life expectancy at birth during the 1980s in Belgium, The Netherlands and some parts of the former Federal Republic of Germany are presented and commented upon. Life expectancy at birth during the 1980s was highest in the Netherlands, and lowest in some parts of southern Belgium. Substantial differentials existed in 1980, particularly because of differential mortality due to diseases of the circulatory system, lung cancer, breast cancer, motor vehicle accidents and suicide. These differentials persisted throughout the 1980s, but gradually converged. Gains in life expectancy were mainly due to declining cardiovascular and cerebrovascular mortality. Sharp and persistent differentials between border regions in the study area point to societal and cultural forces bringing about dividing lines between relatively homogeneous mortality profiles." (SUMMARY IN FRE)
OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and di... more OBJECTIVE: To gain insight into the trends in the prescription ofrofecoxib, the medication and disease histories of rofecoxib users, and the occurrence of cardiac complications during the follow-up. DESIGN: Longitudinal comparative study in family practice. METHOD: Based on the data from family practices (17 family physicians) affiliated with the Registration Network Groningen, a network with about 30,000 patients in the northern part of the Netherlands, the incidence and prevalence ofrofecoxib use were determined per 1000 patients at risk for every quarter during the period 2000-2004. Data on duration, dosage and indications were taken from the rofecoxib prescriptions. Differences in morbidity between rofecoxib users and the users of traditional NSAIDs were compared using logistic regression, and differences between the two groups in the occurrence of cardiac complications were assessed by means of Cox regression analysis. RESULTS: During the period investigated, rofecoxib was pres...