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. 2013 Aug 16;8(8):e71107. doi: 10.1371/journal.pone.0071107

Table 3. Odds ratio of all levels for sleeping quality, diabetes and hypertension by duration of shift work.

Variables Duration of Shift Work
Never 1–4 y 5–9 y 10–19 y ≥20 y
Number of participants
17,345 1,562 1,334 3,205 3,017
Sleeping Quality *
Model 1
Impaired 1.00 1.16 (0.99–1.36) 1.06 (0.94–1.20) 0.99 (0.92–1.08) 0.94 (0.87–1.11)
Poor 1.00 1.36 (1.09–1.70) 1.32 (1.10–1.58) 1.24 (1.10–1.40) 1.02 (0.90–1.14)
Multivariate-Adjusted Model
Impaired 1.00 1.19 (1.01–1.37) 1.01 (0.92–1.10) 1.00 (0.98–1.02) 0.99 (0.95–1.03)
Poor 1.00 1.34 (1.08–1.60) 1.13 (1.05–1.21) 1.05 (1.03–1.07) 1.05 (1.01–1.09)
Diabetes
Model 1 1.00 0.92 (0.76–1.12) 1.01 (0.87–1.17) 1.10 (1.00–1.22) 1.16 (1.06–1.27)
Multivariate-Adjusted Model 1.00 0.99 (0.81–1.20) 1.06 (0.99–1.14) 1.07 (1.03–1.10) 1.05 (1.03–1.08)
Hypertension
Model 1 1.00 0.97 (0.84–1.13) 1.02 (0.91–1.15) 1.06 (0.93–1.09) 1.04 (0.9–1.14)
Multivariate-Adjusted Model 1.00 1.03 (0.89–1.20) 1.05 (0.99–1.11) 1.03 (1.00–1.06) 1.02 (1.01–1.03)

Model 1 : single factor logistic regression.

Multivariate-adjusted model: adjusted for gender (male, female), age (<60 y, 60–75 y, ≥75 y), race (Han, others), marital status (single or divorced, married), tea consumption (no, yes), life stress (no, yes), current smoking status (no, yes), passive smoking (no, yes), current drinking status (no, yes), physical activity (no, yes) and body mass index (<18.5, 18.5–24, 24–28, ≥28).

*

We adjusted chronic diseases (no, yes) except all the confounders in Multivariate-adjusted model.

The reference group was normal sleeping quality group and participants who did not work on shift position.