Table 2.

Differences between completers and non-completers for baseline variables used in final model

Characteristic	Completers	Non-completers	P value
	n=8590	n=3010
Demographics
Age in years, median (IQR 25–75)*	68 (66–72)	69 (67–73)	<0.001
Male sex, n (%)†	4132 (48.1)	1352 (44.9)	0.001
Education, n (%)†
Low	4955 (57.7)	1608 (53.4)	<0.001
Intermediate	1678 (19.5)	359 (11.9)	<0.001
High	1957 (22.8)	282 (9.4)	<0.001
Missing percentage	0.50%	26%
Health status
Self-rated health, n (%)†
Excellent	551 (6.4)	94 (3.1)	<0.001
Very good	1982 (23.1)	308 (10.2)	<0.001
Good	5274 (61.4)	1084 (36.0)	<0.001
Fair	765 (8.9)	214 (7.1)	0.001
Poor	16 (0.2)	4 (0.1)	0.129
Missing percentage	0%	43%
Self-reported chronic diseases, n (%)†
None	4435 (51.6)	1641 (54.5)	0.003
1	3023 (35.2)	956 (31.8)	0.004
≥2	1132 (13.2)	413 (13.7)	0.399
Missing percentage	0%	0%
Health behaviours
Physical activity for at least 30 min, n (%)†
≥5 days/week	5732 (66.7)	663 (22.0)	<0.001
2–4 days/week	2191 (25.5)	290 (9.6)	<0.001
≤1 day/week	667 (7.8)	94 (3.1)	<0.001
Missing percentage	0%	65%
Smoking status, n (%)†
Never smoker	3349 (39.0)	1104 (36.7)	0.007
Former smoker	4628 (53.9)	1309 (43.5)	<0.001
Current smoker	613 (7.1)	176 (5.8)	0.007
Missing percentage	0%	13%
Alcohol consumption, n (%)†
Abstainer	1760 (20.5)	362 (12.0)	<0.001
Low-risk alcohol consumption	4224 (49.2)	561 (18.6)	<0.001
At risk alcohol consumption	2606 (30.3)	497 (16.5)	<0.001
Missing percentage	0%	43%
Physiological markers†
≤2 affected	5859 (68.2)	1185 (39.4)	<0.001
≥3 affected	2731 (31.8)	1604 (53.3)	<0.001
Missing percentage	0%	7%

*Equality of distributions was tested using the Wilcoxon rank-sum test.

†Equality of proportions was tested using the two sample test of proportions.

n, number of participants.