Table 2.

Logistic regression analysis of risk factors associated with sleep quality

Variables	No. of cases/no. of total cases (%)	Model 1		Model 2
		OR (95% CI)	P	OR (95% CI)	P
Age (years)
≤ 30	21/76 (27.63)	1.00 (reference)	NA	1.00 (reference)	NA
> 30	50/131 (38.17)	1.62 (0.88–2.99)	0.13	1.67 (0.59–4.73)	0.33
Gender
Male	12/32 (37.50)	1.18 (0.54–2.58)	0.68	3.89 (1.06–14.24)	0.04
Female	59/175 (33.71)	1.00 (reference)	NA	1.00 (reference)	NA
Working years (years)
1–5	10/43 (23.26)	1.00 (reference)	NA	1.00 (Reference)	NA
6–10	27/85 (31.76)	1.54 (0.66–3.57)	0.32	0.99 (0.22–4.44)	0.99
11–15	24/39 (61.54)	5.28 (2.03–13.76)	1.00 × 10–3	1.32 (0.48–3.60)	0.59
> 15	10/40 (25.00)	1.10 (0.40–3.01)	0.85	4.51 (1.56–13.00)	0.01
Educational level
College	11/29 (37.93)	1.00 (reference)	NA	1.00 (reference)	NA
Undergraduate	54/166 (32.53)	0.79 (0.35–1.79)	0.57	0.48 (0.18–1.27)	0.14
Postgraduate	6/12 (50.00)	1.64 (0.42–6.36)	0.48	2.52 (0.37–17.43)	0.35
Occupation
Doctor	11/38 (28.95)	1.00 (reference)	NA	1.00 (reference)	NA
Nurse	59/155 (38.06)	1.51 (0.70–3.27)	0.30	5.64 (1.35–23.63)	0.02
Technician	1/14 (7.14)	0.19 (0.02–1.62)	0.13	0.49 (0.04–5.62)	0.57
Type of hospital
Grade I hospital or community	2/8 (25.00)	1.00 (reference)	NA	1.00 (reference)	NA
Grade II hospital	11/32 (34.38)	0.63 (0.12–3.20)	0.57	2.13 (0.29–15.56)	0.46
Grade III hospital	58/167 (34.73)	0.98 (044–2.18)	0.97	1.34 (0.22–8.22)	0.75
Working shifts
As usual	16/60 (26.67)	1.00 (reference)	NA	1.00 (reference)	NA
More night shifts	31/60 (51.67)	2.94 (1.37–6.31)	0.01	3.10 (1.31–7.34)	0.01
More day shifts	24/87 (27.59)	1.05 (0.50–2.20)	0.90	1.34 (0.58–3.09)	0.50
Working position
Frontline	52/132 (39.39)	1.92 (1.02–3.59)	0.04	0.34 (0.10–1.15)	0.08
Second line	19/75 (25.33)	1.00 (reference)	NA	1.00 (reference)	NA
Supporting Wuhan
Yes	46/101 (45.54)	2.71 (1.49–4.92)	1.00 × 10–3	3.41 (1.12–10.40)	0.03
No	25/106 (23.58)	1.00 (reference)	NA	1.00 (reference)	NA

Model 1: univariate logistic analysis; model 2: multivariate logistic analysis