Table 1.

Prevalence and missingness of environmental variables

	Participants	Missingness (%)
Men	48.8%	0
Women	51.2%	0
Age*	41 (29–50)*	0
Height (cm)*	175.6 (169–182)	0.53
Weight (kg)*	78.1 (67–87)	0.82
BMI	25.3 (22–27)	1.2
Smoking	11.9%	1.3
Alcohol consumption (daily)	3.0%	4.7
Questionnaire 1	87 000
Questionnaire 2	50 000

*Mean (Quartiles).

BMI, body mass index.