A.G. Schuurman

Increased risk of Parkinson’s disease after depression A retrospective cohort study

BackgroundDepression has been linked to the occurrence of a number of somatic diseases. There are no data for PD. ObjectiveTo determine if depression is associated with a subsequent risk for PD. MethodsA retrospective cohort study design based in general practice was applied. All subjects diagnosed with depression between 1975 and 1990 were included and matched with subjects with the same birth year who were never diagnosed with depression. Follow-up ended at April 30, 2000. Hazard ratios (HR) and 95% CI were calculated using Cox proportional hazards models adjusted for age, sex, and socioeconomic status. Subgroups based on sex and age at diagnosis of depression were evaluated separately. ResultsAmong the 1,358 depressed subjects, 19 developed PD, and among the 67,570 nondepressed subjects, 259 developed PD. The HR (95% CI) for depressed vs nondepressed subjects was 3.13 (1.95 to 5.01) in multivariable analysis. Associations in subgroups were comparable with the overall association. ConclusionA strong positive association was found between depression and subsequent incidence of D.

Animal products, calcium and protein and prostate cancer risk in The Netherlands Cohort Study.

SummaryProstate cancer risk in relation to consumption of animal products, and intake of calcium and protein was investigated in the Netherlands Cohort Study. At baseline in 1986, 58 279 men aged 55–69 years completed a self-administered 150-item food frequency questionnaire and a questionnaire on other risk factors for cancer. After 6.3 years of follow-up, 642 prostate cancer cases were available for analysis. In multivariate case-cohort analyses adjusted for age, family history of prostate cancer and socioeconomic status, no associations were found for consumption of fresh meat, fish, cheese and eggs. Positive trends in risk were found for consumption of cured meat and milk products (P-values 0.04 and 0.02 respectively). For calcium and protein intake, no associations were observed. The hypothesis that dietary factors might be more strongly related to advanced prostate tumours could not be confirmed in our study. We conclude that, in this study, animal products are not strongly related to prostate cancer risk.

Diet, anthropometric measures and prostate cancer risk: A review of prospective cohort and intervention studies

We reviewed 37 prospective cohort and four intervention studies on potential dietary risk factors for prostate cancer, published between 1966 and September 2003. Some studies were limited by small size, crude measurement of dietary exposure and limited control for confounders. Intervention and prospective cohort studies support a protective role against prostate cancer for selenium, and possibly for vitamin E, pulses and tomatoes/lycopene. Overall consumption of meat, eggs, vegetables, fruit, coffee, tea, carotenoids and vitamins A, C and D was not consistently related to prostate cancer risk. Intervention studies also indicate that supplementation with β‐carotene does not lower prostate cancer risk, except possibly in men with low β‐carotene status at baseline. For specific types of meat, alcoholic drinks, dairy products, fat and anthropometric measures, most cohort studies suggest either an increased risk or no relation with prostate cancer. For calcium, two cohort studies suggest an increased risk at very high calcium intakes (>2000 mg/day). In conclusion, prospective studies are consistent with a protective role for selenium, and possibly vitamin E, pulses and tomatoes/lycopene, in the aetiology of prostate cancer. Studies are inconclusive on the role of meat, dairy products, fat, vegetables, fruits, alcohol and anthropometric measures, whereas a very high calcium intake appears to be positively associated with prostate cancer risk.

A prospective cohort study on intake of retinol, vitamins C and E, and carotenoids and prostate cancer risk (Netherlands).

Objectives: The roles of retinol, vitamins C and E, and carotenoids as risk factors for prostate carcinoma are still questionable. We evaluated these in the Netherlands Cohort Study. Methods: The cohort study consisted of 58,279 men ages 55–69 years at baseline in 1986. After 6.3 years of follow-up, 642 incident prostate carcinoma cases were available for analysis. Intakes of retinol, vitamins C and E, and several carotenoids were measured by means of a 150-item semi-quantitative food-frequency questionnaire. Results: In multivariate analyses a positive association with prostate cancer risk was observed for intake of β-cryptoxanthin. Rate ratios (RRs) in increasing quintiles were 1.00 (ref), 0.94, 1.01, 1.16, 1.41; p-trend <0.01. For intake of retinol, vitamins C and E and other carotenoids (α-carotene, β-carotene, lycopene, and lutein/zeaxanthin) no effect on overall prostate cancer risk was found. RRs for vitamin supplement use were decreased, but not significantly. Among nondrinkers, nonsignificant inverse associations were observed for intake of retinol, α-carotene, and β-carotene (RRs, highest vs lowest quintile, were 0.23, 0.60, and 0.76, respectively). Among drinkers, β-cryptoxanthin was positively associated (RR highest vs lowest quintile = 1.40). Conclusions: These data show a positive association between β-cryptoxanthin and prostate cancer risk. Our study also shows inverse associations for retinol, α-carotene, and β-carotene among nondrinkers; this suggests an interaction between vitamins and alcohol consumption, which needs confirmation. Lycopene was not associated with prostate cancer.

Is depression related to subsequent diabetes mellitus

Objective:  To compare the risk of developing diabetes mellitus (DM) in the general population between subjects who had a depression and subjects who never had a depression.

A meta-analysis on depression and subsequent cancer risk

BackgroundThe authors tested the hypothesis that depression is a possible factor influencing the course of cancer by reviewing prospective epidemiological studies and calculating summary relative risks.MethodsStudies were identified by computerized searches of Medline, Embase and PsycINFO. as well as manual searches of reference lists of selected publications. Inclusion criteria were cohort design, population-based sample, structured measurement of depression and outcome of cancer known for depressed and non-depressed subjectsResultsThirteen eligible studies were identified. Based on eight studies with complete crude data on overall cancer, our summary relative risk (95% confidence interval) was 1.19 (1.06–1.32). After adjustment for confounders we pooled a summary relative risk of 1.12 (0.99–1.26).No significant association was found between depression and subsequent breast cancer risk, based on seven heterogeneous studies, with or without adjustment for possible confounders. Subgroup analysis of studies with a follow-up of ten years or more, however, resulted in a statistically significant summary relative risk of 2.50 (1.06–5.91).No significant associations were found for lung, colon or prostate cancer.ConclusionThis review suggests a tendency towards a small and marginally significant association between depression and subsequent overall cancer risk and towards a stronger increase of breast cancer risk emerging many years after a previous depression.

A prospective cohort study on consumption of alcoholic beverages in relation to prostate cancer incidence (The Netherlands).

Objectives: To examine alcohol consumption in relation to prostate cancer incidence in the Netherlands Cohort Study.Methods: At baseline in 1986, 58,279 men aged 55–69 years completed a self-administered questionnaire on diet, consumption of alcoholic beverages and other risk factors for cancer. For data processing and analyses the case–cohort approach was used. After 6.3 years of follow-up, 680 incident primary prostate cancer cases were available for analysis.Results: In multivariate analyses adjusted for age, socioeconomic status and family history of prostate cancer, no association between total alcohol consumption, alcohol intake from beer and liquor and prostate cancer risk was found. Increased associations were found for alcohol from white wine and fortified wines compared to nondrinkers, but not for red wine. The RRs (95% CI) in the intake category of > 15 g/day were 3.3 (1.2–9.2) and 2.3 (1.2–4.7), respectively, after additional adjustment for total alcohol intake. There was, however, no significant trend in risk. Alcohol intake was more strongly related with localized than with advanced prostate tumors.Conclusion: Our results do not support an important role for alcohol in prostate cancer etiology. Nevertheless, for specific types of alcoholic beverages, particularly wines, a positive association was suggested which needs examination in further studies.

A case-cohort study on prostate cancer risk in relation to family history of prostate cancer.

We investigated the risk of prostate cancer in relation to a family history of prostate cancer in 58,279 men ages 55-69 years. We found 704 incident cases after 6.3 years of follow-up. Rate ratios and 95% confidence intervals for having an affected vs nonaffected father and brother were, respectively 1.44 (0.80-2.58) and 5.57 (1.61-19.26). We found no evidence for an increasing risk with an increasing percentage of affected family members. The associations we observed were stronger for cases diagnosed before age 70 compared with cases diagnosed after age 70 and for advanced compared with localized tumors.