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Table 1 Characteristics of study subjects according to night shift work

From: Relationship between thyroid stimulating hormone and night shift work

  Night shift work  
Total No Yes
n n % n % P-valuea
Total   967 421 43.5 % 546 56.5 %  
Age (years) ≤29 364 84 20.0 % 280 51.3 % <0.001
30–39 338 165 39.2 % 173 31.7 %
40–49 229 148 35.2 % 81 14.8 %
≥50 36 24 5.7 % 12 2.2 %
Body mass index (kg/m2) <25 883 381 90.5 % 502 91.9 % 0.490
≥25 84 40 9.5 % 44 8.1 %
Smoking Non-/ex-smoker 966 420 100 % 546 100 % 0.059
Current smoker 1 1 0.0 % 0 0.0 %
Drinking Non-/moderate drinker 683 328 77.9 % 355 65.0 % <0.001
Excessive drinker 284 93 22.1 % 191 35.0 %
Regular exercise No 421 71 16.9 % 76 13.9 % 0.120
Yes 546 350 83.1 % 470 86.1 %
Department Nursing 654 167 39.8 % 487 89.0 % <0.001
Other 313 252 60.2 % 61 11.0 %
  1. aCalculated using the chi-square test