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Table 3 Multivariate-adjusted odds ratios (ORs) for overweight/obesity and obesity according to tertile of shift work duration

From: Association between shift work and obesity among female nurses: Korean Nurses’ Survey

  Unadjusted Model 1 Model 2 Model 3
OR(95% CI) P-value OR(95% CI) P-value OR(95% CI) P-value OR(95% CI) P-value
BMI <23 kg/m2 vs. BMI ≥23 kg/m2 Shift work duration             
Tertile 1 1 (reference)   1 (reference)   1 (reference)   1 (reference)  
Tertile 2 1.37 (1.09-1.73)** 0.007 1.09 (0.86-1.39) 0.471 1.13 (0.89-1.44) 0.311 1.11 (0.87-1.42) 0.404
  Tertiel 3 3.40 (2.77-4.19)*** <0.001 1.67 (1.28-2.19)*** <0.001 1.79 (1.37-2.35)*** <0.001 1.63 (1.22-2.17)** 0.001
BMI <25 kg/m2 vs. BMI ≥25 kg/m2 Shift work duration             
Tertile 1 1 (reference)   1 (reference)   1 (reference)   1 (reference)  
Tertile 2 1.59 (1.12-2.25)* 0.010 1.23 (0.86-1.76) 0.256 1.26 (0.88-1.81) 0.206 1.21 (0.84-1.74) 0.315
  Tertile 3 3.30 (2.41-4.53)*** <0.001 1.48 (1.00-2.18) 0.050 1.56 (1.05-2.31)* 0.028 1.37 (0.91-2.09) 0.135
  1. CI, confidence interval.
  2. Model 1: adjusted for age
  3. Model 2: adjusted for age, current smoking status, regular drinking habit, breakfast skipping and regular exercise.
  4. Model 3: adjusted for age, current smoking status, regular drinking habit, breakfast skipping, regular exercise, marital status, family income, education, sleep problem and self-perceived health status.
  5. *P < 0.05, **P < 0.01, ***P < 0.001.