Henk-Jan Boersema

69 Inability to work fulltime, prevalence and associated factors Table 1 Continued. Total group (n = 30,177) n (%) Ability to work fulltime (n = 18,284) n (%) Inability to work fulltime (n = 11,893) n (%) p-value Diseases of the musculoskeletal system and connective tissue 8612 (28.5%) 6854 (37.5%) 1758 (14.8%) < .001 Diseases of the genitourinary system 275 (0.9%) 95 (0.5%) 180 (1.5%) < .001 Pregnancy, childbirth and the puerperium Conditions originating in the perinatal period Congenital malformations, deformations and chromosomal abnormalities 127 (0.4%) – 137 (0.5%) 96 (0.5%) – 67 (0.4%) 31 (0.3%) – 70 (0.6%) .001 – .005 Symptoms, signs and abnormal clinical and laboratory findings 1385 (4.6%) 1056 (5.8%) 329 (2.8%) < .001 Injury, poisoning and certain other consequences of external causes External causes of morbidity and mortality 2010 (6.7) – 1473 (8.1%) – 537 (4.5%) – < .001 Factors influencing health status 26 (0.1%) 14 (0.1%) 12 (0.1%) .481 Degree of (in)ability to work fulltime > 8 h per day 15,370 (50.9%) 15,370 (84.1%) – < .001 ≤ 8 h per day 2914 (9.7%) 2914 (15.9%) – ≤ 6 h per day 2494 (8.3%) – 2494 (21.0%) ≤ 4 h per day 7438 (24.6%) – 7438 (62.5%) ≤ 2 h per day 1961 (6.5%) – 1961 (16.5%) Univariable and Multivariable Regressions Analyses on Inability to Work Fulltime The uni- and multivariable analyses showed similar significant findings (Table 2). Four ICD-10 disease groups were excluded from the analyses based on a small sample size (less than 0.1% of the total sample): disease groups no disease (n = 13), conditions originating in the perinatal period (n = 0), external causes of morbidity and mortality (n = 0), and factors influencing health status (n = 26). In the final analysis we found higher age (OR 1.01, 95% CI 1.01–1.01), female gender (OR 1.45, 95% CI 1.37–1.52), middle (OR 1.33, 95% CI 1.25–1.40) and high (OR 1.44, 95% CI 1.33–1.55) educational level (compared to low educational level) and multimorbidity (OR 1.06, 95% CI 1.01–1.11) to have a significantly higher risk of the inability to work fulltime. All included disease groups showed higher odds for an inability to work fulltime than the reference disease group “diseases of the musculoskeletal system and connective tissue”. 4

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