Bivariate and multivariate logistic regression outputs of shift worker nurses working at federal government hospitals in Addis Ababa, Ethiopia, 2018 (N=399)
| Variables | Category | SWSD | COR | AOR | |
| Yes | No | ||||
| Age | 20–24 25–29 >29 | 18 70 14 | 99 164 34 | 0.44 (0.19–0.92)* 1.03 (0.52–2.05) 1 | 0.9 (0.32–2.56) 1.4 (0.60–3.56) 1 |
| Sex | Male Female | 52 50 | 130 167 | 0.74 (0.73–0.19) 1 | 0.9 (0.56–1.66) 1 |
| Known chronic medical illness | Yes No | 12 90 | 13 284 | 2.70 (1.28–6.61)* 1 | 1.6 (0.44–6.12) 1 |
| Known mental illness | Yes No | 8 94 | 6 291 | 4.12 (1.39–12.20)* | 2.8 (0.50–15.38) |
| Frequency of rotation | Three shifts Two shifts | 42 60 | 77 220 | 2.00 (1.25–3.21)** 1 | 3.1 (1.68–5.83)*** 1 |
| Use of non-prescribed sleep medication | Yes No | 22 80 | 28 269 | 2.64 (1.442–4.87)** 1 | 1.3 (0.554–3.254) 1 |
| Use of injectable non-prescribed sleep medication | Yes No | 14 88 | 16 281 | 2.79 (1.312–5.917) 1 | 1.8 (0.606–5.167) |
| Ever use khat | Yes No | 32 70 | 49 248 | 2.31 (1.378–3.886)* 1 | 1.8 (0.783–3.955) 1 |
| Ever use of tobacco | Yes No | 18 84 | 22 275 | 2.71 (1.372–5.230)* 1 | 2.3(0.809–6.117) 1 |
| Length of night shift | >12.5 hours ≤12 hours | 80 22 | 195 102 | 1.90 (1.12–3.23)* 1 | 1.7 (0.841–3.45) |
| Average number of nights per month | ≤11 >11 | 54 48 | 237 60 | 1 3.50 (2.17–5.68)*** | 1 6.3 (3.20–12.35) *** |
*P<0.05 (weak association), **p<0.01 (strong association), ***p<0.001 (very strong association).
AOR, adjusted OR; COR, crude OR; SWSD, shift work sleep disorder.