Table 1.

HUNT 1: Characteristics of participants in the MRI study (MRI-p), non-participants (MRI-np) and non-invited (MRI-ni)

VARIABLES	WOMEN				MEN
	MRI-p	MRI-np	MRI-ni	p	MRI-p	MRI-np	MRI-ni	p
Demographic	(n = 530)	(n = 286)	(n = 6678)		(n = 476)	(n = 268)	(n = 5695)
Age (mean [SD])	35.1 [4.2]	35.1 [4.3]	35.6 [4.5]	0.0071	35.3 [4.1]	35.2 [4.2]	35.7 [4.5]	0.071
Education >12 years (n [%])	124 [27.3]	58 [24.2]	779 [13.9]	<0.0012	117 [28.1]	57 [27.3]	882 [18.6]	<0.0012
Separated or divorced (n [%])	24 [4.5]	10 [3.5]	303 [4.5]	0.722	10 [2.1]	5 [1.9]	161 [2.8]	0.432
Non-employed (n [%])	16 [3.0]	8 [2.8]	339 [5.0]	0.032	13 [2.7]	5 [1.9]	196 [3.4]	0.282
Health-related
Fair or poor health (n [%])	64 [12.1]	28 [9.8]	834 [12.3]	0.452	43 [9.1]	28 [10.5]	619 [10.9]	0.462
Physical inactivity (n [%])	23 [5.0]	14 [5.7]	387 [6.8)]	0.252	31 [7.2]	16 [7.5]	412 [8.6]	0.562
Daily smoking (n [%])	159 [34.3]	84 [34.1]	2108 [37.4]	0.252	119 [27.7]	74 [34.7]	1574 [32.7]	0.082
Alcohol abstainers(n [%])	29 [6.3]	19 [7.8]	29 [6.3]	0.652	13 [3.0]	9 [4.2]	163 [3.4]	0.732
BMI (mean [SD])	22.6 [2.7]	23.5 [3.3]	23.4 [3.4]	<0.0011	24.6 [2.3]	24.9 [2.9]	24.8 [2.8]	0.1281
BMI ≥30 kg/m2 (n [%])	8 [1.5]	19 [6.6]	339 [5.1]	<0.0012	9 [1.9]	18 [6.7]	267 [4.7]	0.0042
Laboratory measurements
SBP (mean [SD])	119.3 [13.0]	121.0 [12.5]	121.0 [13.4]	0.0191	129.1 [12.6]	129.9 [12.8]	130.6 [12.8]	0.0521
SBP ≥140 mmHg (n [%])	34 [6.4]	24 [8.4]	603 [9.0]	0.132	93 [19.5]	52 [19.4]	1276 [22.7]	0.142
DBP (mean [SD])	78.6 [8.7]	79.7 [9.3]	77.9 [9.6]	0.0031	83.8 [8.6]	84.2 [9.9]	82.7 [9.3]	0.0031
DBP ≥90 mmHg (n [%])	55 [10.4]	48 [16.8]	759 [11.3]	0.0132	119 [25.0]	76 [28.4]	1253 [22.3]	0.0332

1. One-way analysis-of-variance 2. Chi-squared test.

BMI: Body mass index; SBP: Systolic blood pressure; DBP: Diastolic blood pressure; Fair or poor health: Fair or poor self-perceived health.