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

Table 4 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, men

	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	0.71	0.68	0.73	0.81	0.80	0.76	0.71-0.82	0.73	0.68-0.79	0.67	0.62-0.73
Lowest	0.71	0.62	0.72	0.88	0.74	0.75	0.70-0.80	0.69	0.64-0.75	0.63	0.58-0.69
Interaction study period*educational level p = .419
Employment status
Employed	1.00	1.00	1.00	1.00	1.00	1.00		1.00		1.00
Student	1.30	0.75	1.05	1.47	0.76	1.24	1.01-1.52	1.15	0.93-1.41	1.05	0.83-1.31
Retired	1.80	1.46	1.06	0.95	1.23	1.52	1.37-1.68	1.56	1.40-1.73	1.11	0.99-1.25
Unemployed	1.87	1.82	1.93	1.26	1.79	1.68	1.50-1.87	1.65	1.46-1.86	1.06	0.92-1.21
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	0.80	0.74	0.81	0.90	0.79	0.81	0.74-0.89	0.86	0.78-0.94	0.82	0.75-0.91
Middle	0.83	0.78	0.65	1.09	0.72	0.81	0.74-0.88	0.86	0.78-0.94	0.80	0.73-0.89
2. lowest	0.82	0.67	0.72	0.93	0.74	0.79	0.72-0.86	0.81	0.74-0.89	0.76	0.68-0.84
Lowest	1.05	0.93	0.91	1.37	1.23	1.12	1.03-1.21	1.13	1.03-1.24	1.04	0.94-1.16
Interaction study period*household income level p = .017

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