Socio-economic differences in self-reported insomnia and stress in Finland from 1979 to 2002: a population-based repeated cross-sectional survey

Table 5 Age-adjusted odds ratios (95% Confidence Intervals) for self-reported stress by educational level, employment status and household income level during different study periods between years 1979–2002, women

	Age-adjusted model							Age + all SES variables		Age + all SES variables + depression
	79-82	83-87	88-92	93-97	98-02	1979-2002 ¹		1979-2002 ¹		1979-2002 ¹
	OR	OR	OR	OR	OR	OR	95% CI	OR	95% CI	OR	95% CI
Educational level
Highest	1.00	1.00	1.00	1.00	1.00	1.00		1.00		1.00
Intermediate	0.88	0.68	0.67	0.87	0.89	0.79	0.74-0.85	0.76	0.71-0.82	0.72	0.67-0.79
Lowest	1.03	0.73	0.60	0.75	0.95	0.80	0.74-0.86	0.76	0.70-0.82	0.70	0.64-0.77
Interaction study period*educational level p < .001
Employment status
Employed	1.00	1.00	1.00	1.00	1.00	1.00		1.00		1.00
Student	2.36	1.33	1.90	1.12	1.28	1.57	1.33-1.85	1.45	1.22-1.71	1.40	1.20-1.74
Housewife	1.04	0.71	0.67	0.71	0.69	0.79	0.71-0.88	0.75	0.67-0.84	0.69	0.61-0.78
Retired	2.21	1.47	1.00	0.88	0.98	1.36	1.22-1.52	1.29	1.16-1.45	0.95	0.84-1.07
Unemployed	2.39	1.37	1.61	1.06	1.56	1.45	1.28-1.64	1.37	1.20-1.55	0.99	0.86-1.14
Interaction study period*employment status p < .001
Household income
Highest	1.00	1.00	1.00	1.00	1.00	1.00		1.00		1.00
2. highest	0.88	1.01	0.78	0.89	0.78	0.86	0.79-0.94	0.90	0.83-0.99	0.87	0.79-0.96
Middle	1.04	0.71	0.71	0.79	0.82	0.81	0.74-0.89	0.86	0.78-0.94	0.84	0.76-0.93
2. lowest	1.08	0.96	0.70	0.87	0.86	0.89	0.81-0.97	0.95	0.86-1.04	0.91	0.82-1.01
Lowest	1.51	1.08	0.94	1.19	1.09	1.18	1.08-1.29	1.26	1.14-1.39	1.18	1.06-1.31
Interaction study period*household income level p = .040

ISSN: 1471-2458