Educational level as a predictor of the incidences of non-communicable diseases among middle-aged Japanese: a hazards-model analysis

Table 5 Estimated hazard ratios of diabetes for educational level and baseline socioeconomic status and healthy behaviour

	Men (N = 13,719)				Women (N = 15,332)
	Model 1^a		Model 2^b		Model 1		Model 2
	HR^c	95% CI^d	HR	95% CI	HR	95% CI	HR	95% CI
Ridit score of educational level	1.49 ***	(1.25, 1.79)	1.41***	(1.18, 1.70)	2.65***	(2.09, 3.36)	2.56***	(2.01, 3.26)
Socioeconomic status
Low income			0.96	(0.85, 1.07)			0.97	(0.85, 1.10)
Job status
Unstable job			1.00	(0.86, 1.18)			1.12	(0.98, 1.29)
No job			1.09	(0.91, 1.31)			1.17*	(1.01, 1.36)
Health behaviour
Smoking			1.14**	(1.04, 1.25)			1.07	(0.91, 1.26)
Heavy drinking			1.23**	(1.06, 1.44)			1.08	(0.59, 1.96)
Physical inactivity			1.10*	(1.00, 1.20)			1.05	(0.94, 1.17)
Unhealthy diet			0.91	(0.83, 1.01)			1.07	(0.94, 1.23)

^*** p < 0.001, ^** p < 0.01, ^* p < 0.05
^aAdjusted for ages, self-rated health, and regional areas at baseline
^bAdjusted for socioeconomic status and health behaviour as well as ages, self-rated health, and regional areas at baseline
^cHazard ratio. Its value of the ridit score of educational level indicates the relative index of inequality (RII) of educational level
^dConfidence interval

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