Table 7.

The associations amongst sex, age, body mass index, experience of overseas trips, training-practice schedule, depressive mood and sleep habits, and poor sleep quality (PSQI global score > 5.5) in females

		β	SE	Wald-square	Odds	95% CI	P value
(A) Univariate logistic regression analysis
General information	Age	0.024	0.023	1.131	1.024	0.980–1.070	0.296
	Body mass index	0.047	0.043	1.191	1.048	0.964–1.139	0.878
	Frequency of overseas trips	0.007	0.050	0.022	1.007	0.914–1.111	0.882
Daily schedule	Earliest training-practice start time	− 0.063	0.045	1.918	0.939	0.859–1.026	0.166
	Latest training-practice end time	0.012	0.056	0.050	1.013	0.908–1.129	0.823
	Hours of training-practice per week	0.006	0.009	0.458	1.006	0.988–1.025	0.499
	Bed time	0.141	0.125	1.280	1.151	0.902–1.470	0.258
	Getting up time	− 0.277	0.127	4.794	0.758	0.591–0.971	0.029
	Time in bed	− 0.378	0.120	9.895	0.685	0.542–0.867	0.002
	Nap duration	0.361	0.233	2.411	1.435	0.910–2.265	0.121
Clinical information	Loud snoring	− 0.024	0.251	0.009	0.976	0.597–1.596	0.923
	Sleep apnea	1.061	0.772	1.888	2.889	0.636–13.121	0.169
	Legs twitching or jerking during sleep	0.336	0.227	2.183	1.399	0.896–2.185	0.140
	Disorientation or confusion during sleep	0.316	0.350	0.814	1.371	0.691–2.723	0.367
Mood	Depressive mood	1.036	0.257	16.218	2.817	1.702–4.663	0.000
Sleep hygiene	Being bathed in sunlight after getting up	0.187	0.225	0.693	1.206	0.776–1.873	0.405
	Eating breakfast every morning	0.848	0.301	7.908	2.334	1.293–4.214	0.005
	Not taking a nap after 15:00	0.343	0.224	2.342	1.409	0.908–2.186	0.767
	Not going out to bright places after 21:00	0.086	0.224	0.147	1.090	0.703–1.689	0.701
	Avoid using electronic devices just before bed time	0.772	0.410	3.546	2.164	0.969–4.835	0.060
	Not drinking alcohol to induce sleep	1.024	0.329	9.677	2.784	1.461–5.308	0.002
	Not thinking about troubles in bed	0.880	0.235	13.963	2.410	1.519–3.823	0.000
	Keeping the bedroom quiet and comfortable	0.624	0.340	3.369	1.865	0.959–3.630	0.066
	Using a comfortable mattress and bedclothing	0.454	0.234	3.776	1.574	0.996–2.489	0.052
	Preventing an irregular getting up time (within 2 h)	0.701	0.230	9.317	2.015	1.285–3.159	0.002
(B) Multiple logistic regression analysis
Daily schedule	Getting up time	− 0.353	0.169	4.390	0.702	0.505–0.977	0.036
	Time in bed	− 0.173	0.154	1.257	0.842	0.622–1.138	0.262
Mood	Depressive mood	0.922	0.277	11.092	2.515	1.462–4.329	0.001
Sleep hygiene	Eating breakfast every morning	0.622	0.336	3.429	1.862	0.964–3.595	0.064
	Not drinking alcohol to induce sleep	0.652	0.356	3.359	1.920	0.956–3.857	0.067
	Not thinking about troubles in bed	0.692	0.254	7.403	1.997	1.213–3.286	0.007
	Preventing an irregular getting up time (within 2 h)	0.653	0.258	6.394	1.921	1.158–3.185	0.011