. 2015 Jun 6;53(4):361–367. doi: 10.2486/indhealth.2013-0068

Table 2. Logistic regression analyses for the influence of MEQ class on symptoms of mental and physical fatigue.

	SDS (>45)			Decreased vitality (≥18.8%)			General fatigue (≥22.7%)			Physical disorders (≥17.4%)			Irritability (≥17.7%)			Unwillingness to work (≥17.2%)			Anxiety (≥17.9%)			Depressive feelings (≥19.4%)			Chronic fatigue (≥31.7%)

	OR^a	95% CI^b	p value	OR^a	95% CIb	p value	OR^a	95% CI^b	p value	OR^a	95% CI^b	p value	OR^a	95% CI^b	p value	OR^a	95% CI^b	p value	OR^a	95% CI^b	p value	OR^a	95% CI^b	p value	OR^a	95% CI^b	p value
MEQ class (moderately morning type^c)
Moderately evening type	3.00	0.90–10.03	0.074	2.06	0.63–6.69	0.231	1.78	0.58–5.44	0.313	2.02	0.54–7.49	0.294	1.31	0.38–4.46	0.666	1.40	0.41–4.78	0.592	0.64	0.18–2.22	0.476	2.79	0.89–8.71	0.077	3.33	1.02–10.86	0.046
Intermediate type	1.67	1.06–2.64	0.028	1.67	1.08–2.59	0.021	1.21	0.86–1.72	0.274	1.36	0.81–2.31	0.247	0.97	0.62–1.51	0.889	1.33	0.84–2.11	0.217	1.17	0.78–1.76	0.444	2.02	1.32–3.07	0.001	2.07	1.26–3.40	0.004
Definitely morning type	1.39	0.47–4.11	0.549	0.64	0.18–2.32	0.501	1.68	0.76–3.69	0.201	2.28	0.81–6.47	0.120	0.53	0.15–1.88	0.327	1.26	0.43–3.68	0.678	0.59	0.19–1.82	0.354	1.78	0.69–4.57	0.233	2.19	0.74–6.48	0.158
Monthly on-duty hours (*100 h/month)	1.48	0.86–2.53	0.157	1.08	0.64–1.83	0.776	1.44	0.93–2.23	0.102	1.28	0.70–2.36	0.420	1.34	0.78–2.29	0.287	0.73	0.42–1.29	0.280	1.47	0.90–2.42	0.127	0.81	0.49–1.34	0.407	1.95	1.13–3.36	0.016
Age (yr)	0.98	0.96–1.01	0.155	0.97	0.95–0.99	0.007	1.01	0.99–1.03	0.191	0.98	0.96–1.01	0.149	0.96	0.94–0.98	<0.001	0.97	0.95–1.00	0.025	0.96	0.94–0.98	<0.001	0.96	0.94–0.98	<0.001	0.96	0.94–0.98	0.001
Marital status (not married/married^c)	1.40	0.87–2.27	0.170	1.04	0.65–1.67	0.861	0.73	0.48–1.10	0.131	1.44	0.84–2.48	0.183	0.64	0.38–1.07	0.089	1.26	0.78–2.05	0.349	0.95	0.60–1.49	0.809	0.84	0.54–1.33	0.463	0.72	0.42–1.22	0.218
Smoking (nonsmoker/smoker^c)	0.80	0.54–1.19	0.274	0.74	0.50–1.09	0.126	0.85	0.62–1.16	0.298	0.83	0.53–1.31	0.425	1.11	0.74–1.66	0.612	1.11	0.74–1.67	0.600	0.86	0.60–1.24	0.432	0.92	0.64–1.32	0.640	0.93	0.62–1.41	0.735
Alcohol consumption (g/wk)	0.96	0.92–1.00	0.068	0.98	0.94–1.02	0.393	0.98	0.94–1.01	0.194	0.99	0.94–1.04	0.751	0.99	0.95–1.04	0.698	0.99	0.94–1.03	0.518	1.00	0.96–1.04	0.879	1.00	0.96–1.04	0.988	0.96	0.92–1.01	0.111
Regular exercise (more than 4 times/wk^c)
Absent	1.89	1.09–3.28	0.022	1.87	1.11–3.15	0.019	1.36	0.86–2.16	0.188	1.91	1.01–3.60	0.046	1.47	0.84–2.58	0.178	2.51	1.45–4.35	0.001	1.73	1.02–2.92	0.041	1.93	1.16–3.20	0.012	1.77	0.99–3.16	0.053
1–4 times/wk	1.44	0.92–2.26	0.109	1.10	0.72–1.70	0.653	1.29	0.91–1.82	0.148	1.66	0.98–2.80	0.058	1.24	0.79–1.94	0.349	1.44	0.91–2.28	0.122	1.94	1.29–2.94	0.002	1.39	0.93–2.09	0.112	1.40	0.88–2.25	0.158
Subjective sleep qualities (presence)
Sleep-onset insomnia	1.60	1.05–2.44	0.028	1.34	0.89–2.02	0.160	1.62	1.15–2.27	0.005	1.60	0.98–2.61	0.062	1.15	0.75–1.78	0.519	1.49	0.97–2.29	0.067	1.36	0.92–2.01	0.126	1.23	0.83–1.82	0.302	1.31	0.83–2.05	0.243
Sleep-maintaining insomnia	2.82	1.81–4.41	<0.001	2.32	1.51–3.57	<0.001	1.45	1.02–2.05	0.039	2.79	1.68–4.64	<0.001	2.69	1.71–4.24	<0.001	2.59	1.65–4.05	<0.001	1.85	1.23–2.77	0.003	1.56	1.04–2.34	0.032	1.87	1.17–2.98	0.009
Early morning awakenings	0.97	0.63–1.48	0.874	1.47	0.97–2.24	0.072	1.64	1.17–2.30	0.004	1.75	1.04–2.92	0.034	1.28	0.82–1.98	0.278	1.35	0.87–2.10	0.177	1.65	1.11–2.47	0.014	1.77	1.18–2.63	0.005	1.03	0.66–1.61	0.899
Sleeping hours (less than 6 h/6 h or more)	2.00	1.17–3.43	0.012	1.60	0.94–2.73	0.085	1.48	0.91–2.40	0.112	1.70	0.92–3.13	0.089	2.27	1.33–3.87	0.003	1.64	0.94–2.86	0.083	1.34	0.80–2.27	0.266	1.41	0.84–2.37	0.197	1.38	0.78–2.44	0.264

MEQ: Morningness-Eveningness Questionnaire, SDS: Self-rating Depression Scale. ^aOdds ratios. ^b95% confidence interval. ^cControl categories.