Keiko Yamada1, Hiroyasu Iso2, Renzhe Cui1, Akiko Tamakoshi3. 1. Department of Social Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-shi, Osaka, 565-0871 Japan. 2. Department of Social Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-shi, Osaka, 565-0871 Japan. Electronic address: iso@pbhel.med.osaka-u.ac.jp. 3. Department of Public Health, Hokkaido University Graduate School of Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638 Japan.
Abstract
BACKGROUND: This study aimed to examine the association between recurrent pregnancy loss and the risk of cardiovascular disease mortality. METHODS: We identified 54,652 women who were pregnant during the Japan Collaborative Cohort Study. These women were 40-79 years at the date of cohort entry between 1988 and 1990. Participants received municipal health screening examinations and completed self-administered questionnaires. The cause of death was confirmed by annual or biannual follow-up surveys for a median of 18 years. The exposure was the number of pregnancy loss. The outcome was mortality from total cardiovascular disease and its subtypes according to the International Classification of Diseases, 10th Revision. Adjustment variables included age, number of deliveries, education, body mass index, physical activity, smoking status, and drinking status. Kaplan-Meier survival curves were used to estimate the cumulative mortality. RESULTS: The number of pregnancy loss tended to be inversely associated with the risk of mortality from total stroke, intracerebral hemorrhage, and total cardiovascular disease. The multivariable hazard ratio of total cardiovascular disease for ≥2 pregnancy losses versus no pregnancy loss was .84 (95% confidence interval, .74-0.95). A 2-fold excess risk of mortality from ischemic stroke associated with ≥2 pregnancy losses was observed in women aged 40-59 years, with a multivariable hazard ratio of 2.19 (95% confidence interval, 1.06-4.49), but not in older women. CONCLUSIONS: Recurrentpregnancy loss tends to be associated with a lower risk of mortality from cardiovascular disease at 40-79 years. Younger women have an excess risk of ischemic stroke mortality associated with recurrent pregnancy loss.
BACKGROUND: This study aimed to examine the association between recurrent pregnancy loss and the risk of cardiovascular disease mortality. METHODS: We identified 54,652 women who were pregnant during the Japan Collaborative Cohort Study. These women were 40-79 years at the date of cohort entry between 1988 and 1990. Participants received municipal health screening examinations and completed self-administered questionnaires. The cause of death was confirmed by annual or biannual follow-up surveys for a median of 18 years. The exposure was the number of pregnancy loss. The outcome was mortality from total cardiovascular disease and its subtypes according to the International Classification of Diseases, 10th Revision. Adjustment variables included age, number of deliveries, education, body mass index, physical activity, smoking status, and drinking status. Kaplan-Meier survival curves were used to estimate the cumulative mortality. RESULTS: The number of pregnancy loss tended to be inversely associated with the risk of mortality from total stroke, intracerebral hemorrhage, and total cardiovascular disease. The multivariable hazard ratio of total cardiovascular disease for ≥2 pregnancy losses versus no pregnancy loss was .84 (95% confidence interval, .74-0.95). A 2-fold excess risk of mortality from ischemic stroke associated with ≥2 pregnancy losses was observed in women aged 40-59 years, with a multivariable hazard ratio of 2.19 (95% confidence interval, 1.06-4.49), but not in older women. CONCLUSIONS: Recurrentpregnancy loss tends to be associated with a lower risk of mortality from cardiovascular disease at 40-79 years. Younger women have an excess risk of ischemic stroke mortality associated with recurrent pregnancy loss.
Authors: Chen Liang; Hsin-Fang Chung; Annette J Dobson; Kunihiko Hayashi; Yvonne T van der Schouw; Diana Kuh; Rebecca Hardy; Carol A Derby; Samar R El Khoudary; Imke Janssen; Sven Sandin; Elisabete Weiderpass; Gita D Mishra Journal: BMJ Date: 2022-06-22
Authors: Denise H J Habets; Veronique M M M Schiffer; Lisa P A Kraneburg; Femke J W de Krom; Irem Gürtekin; Bo E van Bree; Ron J T van Golde; Lotte Wieten; Marc E A Spaanderman; Salwan Al-Nasiry Journal: BMC Pregnancy Childbirth Date: 2022-01-27 Impact factor: 3.007