Table 1

Baseline characteristics stratified by work schedule

TotalDaytime workersNight shift workers
Participantsn=9243n=7853n=1390
Male, n (%)6765 (73.2)5918 (75.4)847 (60.9)
Median age (IQR), years46 (40–53)46 (40–54)43 (37–52)
Median BMI (IQR), kg/m227.3
(26.0–29.6)
27.3
(26.0–29.5)
27.7
(26.1–30.0)
Comorbidities, n (%)
Diabetes*1023 (11.5)890 (11.7)133 (10.2)
CAD141 (1.5)129 (1.6)12 (0.9)
CVD117 (1.3)100 (1.3)17 (1.2)
Cancer202 (2.2)172 (2.2)30 (2.2)
Hours of work, n (%)
 ≥10 hours/day2753 (29.9)2355 (30.1)398 (28.8)
Hours of sleep, n (%)
 <7 hours/day7777 (84.7)6612 (84.8)1165 (84.4)
Alcohol habits, n (%)
 ≥3 times/week4680 (50.7)4097 (52.2)583 (42.0)
Smoking status, n (%)
 Current smoker2498 (27.0)2101 (26.8)397 (28.6)
  • *Diabetes was defined as fasting plasma glucose≥7.0 mmol/L (126 mg/dL), postprandial plasma glucose≥11.2 mmol/L (200 mg/dL), HbA1c≥6.5%, self-reported diabetes previously diagnosed by physicians, or the use of antidiabetic agents.

  • BMI, body mass index; CAD, coronary artery disease; CVD, cerebrovascular disorder.