Table 1. Overview of Population Characteristics Stratified by the Assessment Center^a.

	total	Belgium	Luxembourg
	N = 941	N = 481	N = 460
age (years), mean (SD)	44.8 (13.5)	44.6 (13.9)	44.9 (13.1)
Gender, N (%)
Male	292 (31.0%)	119 (24.7%)	173 (37.6%)
Female	649 (69.0%)	362 (75.3%)	287 (62.4%)
Educational attainment, N (%)
low	364 (38.7%)	120 (24.9%)	244 (53.0%)
intermediate	213 (22.6%)	120 (24.9%)	93 (20.2%)
high	358 (38.0%)	241 (50.1%)	117 (25.4%)
missing, N (%)	6 (0.6%)	0 (0.0%)	6 (1.3%)
Smoking status, N (%)
never smoker	520 (55.3%)	257 (53.4%)	263 (57.2%)
former smoker	221 (23.5%)	105 (21.8%)	116 (25.2%)
current smoker	200 (21.3%)	119 (24.7%)	81 (17.6%)
energy (kcal/day), mean (SD)	2266.5 (763.3)	2214.1 (702.4)	2320.7 (818.9)
missing, N (%)	7 (0.7%)	6 (1.2%)	1 (0.2%)
proteins (g/day), mean (SD)	88.6 (30.7)	86.9 (27.2)	90.3 (33.9)
missing, N (%)	6 (0.6%)	3 (0.6%)	3 (0.7%)
fats (g/day), mean (SD)	96.6 (37.7)	92.4 (33.2)	100.8 (41.5)
missing, N (%)	9 (1.0%)	7 (1.5%)	2 (0.4%)
carbohydrates (g/day), mean (SD)	239.4 (89.0)	235.7 (82.3)	243.2 (95.5)
missing, N (%)	8 (0.9%)	6 (1.2%)	2 (0.4%)
fibres (g/day), mean (SD)	24.0 (8.9)	23.6 (7.8)	24.4 (9.8)
missing, N (%)	8 (0.9%)	6 (1.2%)	2 (0.4%)
Physical activity, N (%)
inactive	196 (20.8%)	121 (25.2%)	75 (16.3%)
moderately active	288 (30.6%)	157 (32.6%)	131 (28.5%)
active	367 (39.0%)	129 (26.8%)	238 (51.7%)
missing, N (%)	90 (9.6%)	74 (15.4%)	16 (3.5%)
Alcohol consumption, N (%)
low	175 (18.6%)	93 (19.3%)	82 (17.8%)
moderate	499 (53.0%)	233 (48.4%)	266 (57.8%)
high	260 (27.6%)	153 (31.8%)	107 (23.3%)
missing, N (%)	7 (0.7%)	2 (0.4%)	5 (1.1%)

^aThe proportion of missing values are shown for variables with missing values. SD = standard deviation.