Table 3. Logistic regression of hypertension prevalence change per period as well as absolute changes (AC) and aetiologic fractions (AF) of hypertension during the study period by sex, age, educational status and obesity (adjusted for age).

OR = Odds ratio. AC% = absolute change in hypertension prevalence during the study period as computed by logistic regression. AF% = aetiologic fractions of hypertension during the study period as computed by logistic regression.

Predictor	Obese				Non-obese
	OR hypertension (95% CI)	P-value	AC hypertension (%)	AF hypertension (%)	OR hypertension (95% CI)	P-value	AC hypertension (%)	AF hypertension (%)
Total	1.12 (1.12–1.13)	< 0.001	37.9	97.1	1.13 (1.13–1.14)	< 0.001	13.0	96.4
Sex a
Women	1.12 (1.11–1.13)	< 0.001	50.2	96.0	1.15 (1.13–1.16)	< 0.001	35.0	94.2
Men	1.15 (1.14–1.16)	< 0.001	18.9	99.0	1.12 (1.12–1.13)	< 0.001	27.3	98.0
Age group (years)
20–34	1.17 (1.11–1.22)	< 0.001	11.5	99.4	1.12 (1.09–1.14)	< 0.001	1.5	93.6
35–54	1.11 (1.10–1.12)	< 0.001	26.6	96.7	1.12 (1.11–1.13)	< 0.001	7.1	96.0
55–74	1.13 (1.12–1.14)	< 0.001	49.7	97.3	1.14 (1.13–1.15)	< 0.001	26.2	96.4
≥ 75	1.13 (1.11–1.15)	< 0.001	54.5	97.0	1.14 (1.12–1.15)	< 0.001	38.3	97.1
Educational status a , b
Low education	1.15 (1.14–1.16)	< 0.001	18.0	95.7	1.16 (1.16–1.17)	< 0.001	13.1	96.0
Middle education	1.17 (1.13–1.21)	< 0.001	24.0	96.9	1.18 (1.16–1.21)	< 0.001	14.2	96.7
High education	1.15 (1.09–1.21)	< 0.001	12.2	95.8	1.18 (1.14–1.21)	< 0.001	8.6	97.1

^acorrection variable for regression: age interval of 5 years.

^bstudy period = 1983 to 2006/07.