Pub Date : 2024-10-22DOI: 10.1177/14034948241283545
Torben JØrgensen, Rikke K Jacobsen, Marie Weinreich Petersen, Anne A Bjerregaard, Signe Ulfbeck Schovsbo, Lise K Gormsen, Lene Falgaard Eplov, Allan Linneberg, Per Fink, Michael Eriksen Benros, Thomas Dantoft
Aims: To assess whether lifestyle factors, including sleep pattern, are predictors for the development of functional somatic disorder (FSD).
Methods: A population-based prospective cohort of 9656 men and women aged 18-76 years was established in 2011-2015 and invited for re-examination in 2017-2020, when 5738 participated. Median follow-up period was 65 months. Participants filled in validated questionnaires on lifestyle, sleep pattern and various delimitations of FSD, which were operationalized using two different approaches: bodily distress syndrome (BDS) and functional somatic syndromes (FSS) (i.e. chronic fatigue, chronic widespread pain (CWP), irritable bowel, and multiple chemical sensitivity (MCS)). Baseline lifestyle and sleep pattern in relation to incidence of BDS and FSS (chronic fatigue, CWP, irritable bowel, MCS) was analysed by logistic regressions, adjusted for age, sex and subjective social status.
Results: Inferior sleep quality at baseline predicted both incidence of BDS and all FSS delimitations except MCS. Smoking, alcohol intake, and low physical activity, but not diet, were predictors for the development of BDS. No uniform pattern was observed for the FSS. Smoking predicted development of chronic fatigue, CWP and irritable bowel, but not MCS. Alcohol and food quality only influenced the development of chronic fatigue whereas low physical activity only influenced the development of chronic fatigue and CWP.
Conclusions: Lifestyle factors and sleep pattern seem to be predictors for some delimitations of FSD, but the importance of the various lifestyle factors is different for the different delimitations. The study shows the importance of analysing the various FSSs separately.
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Pub Date : 2024-10-22DOI: 10.1177/14034948241281197
Kaitlyn M Tsuruda, Hilde Langseth, Giske Ursin, Solveig Hofvind, R T Fortner
Aims: Reproductive history conveys information about potential health risks later in adulthood. This study aimed to examine the validity of self-reported number of pregnancies and maternal age at first birth (AFB) among females attending BreastScreen Norway.
Methods: Participants were identified through the Janus Serum Bank cohort in Norway and were eligible for this cross-sectional validation study if they participated in a health survey issued by BreastScreen Norway between 2006 and 2015. Retrospective self-reported survey information on number of pregnancies and AFB in years was validated against prospectively collected information from the Medical Birth Registry of Norway (MBRN) using the Spearman rank (rs) and intraclass correlation coefficients (ICC) with 95% confidence intervals (CI).
Results: After exclusions, 51,598 subjects were included in the analysis on number of pregnancies and 46,919 in the analysis on AFB. On average, study subjects were 59-60 years old when completing the health survey and had become first-time mothers roughly 36 years earlier. Survey-based information about number of pregnancies was highly correlated and demonstrated high agreement with the registry data (rs=0.967, 95% CI 0.964-0.969; ICC=0.884, 95% CI 0.882-0.885). Survey-based information about AFB demonstrated even higher correlation and very high agreement with the registry data (rs=0.975, 95% CI 0.973-0.976; ICC=0.974, 95% CI 0.974-0.975).