Correlation of fourteen subjectively reported adverse mental states with insomnia: Gender differences in a cross-sectional study

Table 6 Binary logistic regression analysis of factors influencing severe insomnia in women

Variables	β	SE	Z	P value	Odds ratio	95%CI
Age	0.05	0	10.11	< 0.001c	1.05	1.04-1.06
Season
Spring						1.00 (reference)
Summer	0.36	0.17	2.07	0.038a	1.43	1.02-2.01
Autumn	0.2	0.16	1.25	0.209	1.22	0.89-1.67
Winter	0.42	0.18	2.3	0.021a	1.52	1.06-2.17
Depression	0.58	0.14	4.02	< 0.001c	1.79	1.35-2.38
Indecision	-0.64	0.29	-2.18	0.029a	0.53	0.30-0.94
Grief	0.61	0.22	2.8	0.005b	1.83	1.20-2.80
Forgetfulness	0.29	0.12	2.36	0.018a	1.34	1.05-1.71
Slow response	0.43	0.14	3.13	0.002b	1.53	1.17-2.00

^aP < 0.05.

^bP < 0.01.

^cP < 0.001.

β: Unstandardized regression coefficient; Z: The ratio of the regression coefficient to its standard error.