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

Table 7 Estimated hazard rates of each non-communicable disease for educational level, using the entire sample^a

	Ridit score of educational level		Females		Ridit score of educational level × Females		N
	HR^b (RII)	95% CI^c	HR	95% CI	HR	95% CI	N
Diabetes	1.37***	(1.14, 1.64)	0.41***	(0.34, 0.50)	2.01***	(1.50, 2.69)	29,051
Heart disease	0.91	(0.74, 1.12)	0.58***	(0.47, 0.72)	1.28	(0.90, 1.81)	30,383
Stroke	1.38*	(1.03, 1.84)	0.55***	(0.41, 0.74)	1.35	(0.84, 2.17)	30,823
Hypertension	1.01	(0.90, 1.14)	0.54***	(0.48, 0.61)	1.51***	(1.24, 1.84)	25,866
Hyperlipidaemia	0.60***	(0.53, 0.69)	1.02	(0.91, 1.14)	1.10	(0.90, 1.34)	28,497
Cancer	1.16	(0.93, 1.44)	1.02	(0.83, 1.24)	0.90	(0.64, 1.26)	30,692

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

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