BACKGROUND: The long-term observation of vegetarians in affluent countries can provide insight into the relative effects of a vegetarian diet and lifestyle factors on mortality. METHODS: A cohort study of vegetarians and health-conscious persons in Germany was followed-up prospectively for 21 years, including 1,225 vegetarians and 679 health-conscious nonvegetarians. Standardized mortality ratios compared with the German general population were calculated for all causes and specific causes. Within the cohort, Poisson regression modeling was used to investigate the joint effects of several risk factors on overall and cause-specific mortality. RESULTS: Standardized mortality ratios for all-cause mortality was significantly below 100: 59 [95% confidence interval (95% CI), 54-64], predominantly due to a deficit of deaths from circulatory diseases. Within the cohort, vegetarian compared with nonvegetarian diet had no effect on overall mortality [rate ratio (RR), 1.10; 95% CI, 0.89-1.36], whereas moderate and high physical activity significantly reduced risk of death (RR, 0.62, 0.64), adjusted for age, sex, smoking, alcohol intake, body mass index, and educational level. Vegetarian diet was however associated with a reduced RR of 0.70 (95% CI, 0.41-1.18) for ischemic heart disease, which could partly be related to avoidance of meat. CONCLUSIONS: Both vegetarians and nonvegetarian health-conscious persons in this study have reduced mortality compared with the general population. Within the study, low prevalence of smoking and moderate or high level of physical activity but not strictly vegetarian diet was associated with reduced overall mortality. The nonsignificant reduction in mortality from ischemic heart diseases in vegetarians compared with health-conscious persons could be explained in part by avoidance of meat intake.
BACKGROUND: The long-term observation of vegetarians in affluent countries can provide insight into the relative effects of a vegetarian diet and lifestyle factors on mortality. METHODS: A cohort study of vegetarians and health-conscious persons in Germany was followed-up prospectively for 21 years, including 1,225 vegetarians and 679 health-conscious nonvegetarians. Standardized mortality ratios compared with the German general population were calculated for all causes and specific causes. Within the cohort, Poisson regression modeling was used to investigate the joint effects of several risk factors on overall and cause-specific mortality. RESULTS: Standardized mortality ratios for all-cause mortality was significantly below 100: 59 [95% confidence interval (95% CI), 54-64], predominantly due to a deficit of deaths from circulatory diseases. Within the cohort, vegetarian compared with nonvegetarian diet had no effect on overall mortality [rate ratio (RR), 1.10; 95% CI, 0.89-1.36], whereas moderate and high physical activity significantly reduced risk of death (RR, 0.62, 0.64), adjusted for age, sex, smoking, alcohol intake, body mass index, and educational level. Vegetarian diet was however associated with a reduced RR of 0.70 (95% CI, 0.41-1.18) for ischemic heart disease, which could partly be related to avoidance of meat. CONCLUSIONS: Both vegetarians and nonvegetarian health-conscious persons in this study have reduced mortality compared with the general population. Within the study, low prevalence of smoking and moderate or high level of physical activity but not strictly vegetarian diet was associated with reduced overall mortality. The nonsignificant reduction in mortality from ischemic heart diseases in vegetarians compared with health-conscious persons could be explained in part by avoidance of meat intake.
Authors: Nathalie Tatjana Burkert; Wolfgang Freidl; Franziska Großschädel; Johanna Muckenhuber; Willibald J Stronegger; Eva Rásky Journal: Wien Klin Wochenschr Date: 2013-12-17 Impact factor: 1.704
Authors: Sabine Rohrmann; Kim Overvad; H Bas Bueno-de-Mesquita; Marianne U Jakobsen; Rikke Egeberg; Anne Tjønneland; Laura Nailler; Marie-Christine Boutron-Ruault; Françoise Clavel-Chapelon; Vittorio Krogh; Domenico Palli; Salvatore Panico; Rosario Tumino; Fulvio Ricceri; Manuela M Bergmann; Heiner Boeing; Kuanrong Li; Rudolf Kaaks; Kay-Tee Khaw; Nicholas J Wareham; Francesca L Crowe; Timothy J Key; Androniki Naska; Antonia Trichopoulou; Dimitirios Trichopoulos; Max Leenders; Petra H M Peeters; Dagrun Engeset; Christine L Parr; Guri Skeie; Paula Jakszyn; María-José Sánchez; José M Huerta; M Luisa Redondo; Aurelio Barricarte; Pilar Amiano; Isabel Drake; Emily Sonestedt; Göran Hallmans; Ingegerd Johansson; Veronika Fedirko; Isabelle Romieux; Pietro Ferrari; Teresa Norat; Anne C Vergnaud; Elio Riboli; Jakob Linseisen Journal: BMC Med Date: 2013-03-07 Impact factor: 8.775
Authors: Nathalie T Burkert; Johanna Muckenhuber; Franziska Großschädl; Eva Rásky; Wolfgang Freidl Journal: PLoS One Date: 2014-02-07 Impact factor: 3.240
Authors: Jian-Bing Wang; Jin-Hu Fan; Sanford M Dawsey; Rashmi Sinha; Neal D Freedman; Philip R Taylor; You-Lin Qiao; Christian C Abnet Journal: Sci Rep Date: 2016-03-04 Impact factor: 4.379