Table 4.
Hazard Ratios Of Association Between Current Shift Workers And Type 2 Diabetes For The Imputed And Unimputed Datasets, Stratified By Gender
| Shift-work status | Case/N | PYs | IRs/ 1000 PYs | 95% CI | Type 2 Diabetes Vs Normal | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Unadjusted | Adjusted Model 1 | Adjusted Model 2 | ||||||||
| HR | 95% CI | HR | 95% CI | HR | 95% CI | |||||
| IMPUTED DATASET | ||||||||||
| Overall | 154/5947 | 32,534 | 4.73 | 4.02–5.54 | ||||||
| Day workers | 97/4095 | 21,642 | 4.48 | 3.63–5.47 | 1.00 | 1.00 | 1.00 | |||
| Former shift workers | 10/599 | 3289 | 3.04 | 1.46–5.59 | 0.67 | 0.35–1.29 | 0.82 | 0.42–1.57 | 0.72 | 0.37–1.40 |
| Current shift workers | 47/1253 | 7603 | 6.18 | 4.54–8.22 | 1.33 | 0.94- 1.89 | 1.82 | 1.27- 2.60 | 1.85 | 1.27–2.69 |
| Female | 101/4647 | 25,611 | 3.94 | 3.21–4.79 | ||||||
| Day workers | 62/3049 | 16,148.5 | 3.84 | 2.94–4.92 | 1.00 | 1.00 | 1.00 | |||
| Former shift workers | 7/491 | 2720.5 | 2.57 | 1.03–5.30 | 0.66 | 0.30–1.45 | 0.81 | 0.37–1.78 | 0.59 | 0.26–1.36 |
| Current shift workers | 32/1107 | 6742 | 4.75 | 3.25–6.70 | 1.20 | 0.78–1.83 | 1.50 | 0.97–2.33 | 1.52 | 0.98–2.36 |
| Male | 53/1300 | 6923 | 7.66 | 5.73–10.01 | ||||||
| Day workers | 35/1046 | 5493.5 | 6.37 | 4.44–8.86 | 1.00 | 1.00 | 1.00 | |||
| Former shift workers | 3/108 | 568.5 | 5.28 | 1.09–15.42 | 0.83 | 0.25–2.69 | 0.80 | 0.25–2.61 | 1.02 | 0.31–3.34 |
| Current shift workers | 15/146 | 861 | 17.42 | 9.75–28.73 | 2.66 | 1.45–4.87 | 2.77 | 1.51–5.08 | 2.98 | 1.58–5.62 |
| p-interaction | 0.1067 | 0.2666 | 0.1960 | |||||||
| UNIMPUTED DATASET | ||||||||||
| Overall | 154/5947 | 32,534 | 4.73 | 4.02–5.54 | ||||||
| Day workers | 97/4095 | 21,642 | 4.48 | 3.63–5.47 | 1.00 | 1.00 | 1.00 | |||
| Former shift workers | 10/599 | 3289 | 3.04 | 1.46–5.59 | 0.67 | 0.35–1.29 | 0.79 | 0.40–1.58 | 0.72 | 0.35–1.45 |
| Current shift workers | 47/1253 | 7603 | 6.18 | 4.54–8.22 | 1.33 | 0.94–1.89 | 1.91 | 1.33–2.75 | 2.05 | 1.40–3.02 |
| Female | 101/4647 | 25,611 | 3.94 | 3.21–4.79 | ||||||
| Day workers | 62/3049 | 16,148.5 | 3.84 | 2.94–4.92 | 1.00 | 1.00 | 1.00 | |||
| Former shift workers | 7/491 | 2720.5 | 2.57 | 1.03–5.30 | 0.66 | 0.30–1.45 | 0.75 | 0.32–1.76 | 0.57 | 0.24–1.37 |
| Current shift workers | 32/1107 | 6742 | 4.75 | 3.25–6.70 | 1.20 | 0.78–1.83 | 1.58 | 1.01–2.45 | 1.68 | 1.07–2.63 |
| Male | 53/1300 | 6923 | 7.66 | 5.73–10.01 | ||||||
| Day workers | 35/1046 | 5493.5 | 6.37 | 4.44–8.86 | 1.00 | 1.00 | 1.00 | |||
| Former shift workers | 3/108 | 568.5 | 5.28 | 1.09–15.42 | 0.83 | 0.25–2.69 | 0.85 | 0.26–2.77 | 1.13 | 0.34–3.73 |
| Current shift workers | 15/146 | 861 | 17.42 | 9.75–28.73 | 2.66 | 1.45–4.87 | 2.93 | 1.59–5.41 | 3.32 | 1.73–6.35 |
| p-interaction | 0.1067 | 0.2691 | 0.1845 | |||||||
Notes: Model 1, Adjusted for age at baseline (years), family history of DM (no/yes), BMI at baseline (kg/m2), hypertension at baseline (yes; SBP ≥140 mmHg and/or DBP ≥90 mmHg/no). Model 2, model 1 additional adjusted for FPG at baseline (mg/dL), WBC at Baseline (cells/µL), TG at baseline (mg/dL), HDL-C at baseline (mg/dL), WC at baseline (cm), marital status (single or divorce/married), education level (≤12 years/>12 years).
Abbreviations: N, Number; PYs, person-years; IR, incidence rates; 95% CI, 95% confidence intervals; HR, hazard ratio.