Table 4. Trends in educational inequalities in NCDs between 2007 and 2015.

Men	2007–2009	2010–2012	2013–2015	P for trend across surveys†
	RII (95% CI)	RII (95% CI)	RII (95% CI)
Diabetes	1.37 (0.90 to 2.08)	1.46 (1.02 to 2.11)*	1.30 (0.94 to 1.80)	0.758
Arthritis	4.09 (2.21 to 7.62)***	2.01 (1.14 to 3.56)**	3.89 (2.15 to 7.07)***	0.227
Asthma	2.00 (0.94 to 4.26)	1.74 (0.76 to 4.00)	0.75 (0.33 to 1.69)	0.001
Depressive symptoms	1.81 (1.21 to 2.72)***	2.42 (1.57 to 3.75)***	3.82 (2.17 to 6.73)***	0.156
Women
Diabetes	7.59 (4.04 to 14.22)***	5.10 (2.84 to 9.18)***	2.58 (1.61 to 4.15)***	0.096
Arthritis	5.79 (3.52 to 9.54)***	5.46 (3.57 to 8.36)***	3.98 (2.74 to 5.79)***	0.033
Asthma	3.17 (1.24 to 8.09)**	2.82 (1.30 to 6.09)**	2.51 (1.43 to 4.41)**	0.047
Depressive symptoms	2.50 (1.83 to 3.43)***	2.29 (1.67 to 3.14)***	4.24 (2.77 to 6.49)***	0.881

RII values larger than 1 indicate that the prevalence of NCDs is higher in the less educated group.

†P-values for the interactions between survey period and ridit-score.

* p<0.05.

**p<0.01.

*** p<0.001.