Table 1. Descriptive statistics of the sample (N = 15,001).

	All	Singles	Couples	P-value
Socio-demographic factors, %
Age				0.189
(mean (SD))	52.9 (15.9)	52.6 (20.0)	53.0 (14.2)
(median (IQR))	53.0 (24.0)	55.0 (31.0)	53.0 (22.0)
Sex				<0.001
Male	50.1	45.6	51.7
Female	49.9	54.4	48.3
Education
13+ years	51.8	47.7	53.3
0–12 years	48.2	52.3	46.7
Employment				<0.001
Yes	57.5	48.5	60.7
No	42.5	51.5	39.3
Urbanisation				<0.001
Urban	80.5	83.6	79.4
Rural	19.5	16.4	20.6
Indigenous				0.011
Yes	1.4	1.9	1.3
No	98.6	98.1	98.7
Number of children under 18 years living at the residence				<0.001
None	64.9	80.0	59.6
One or more children	35.1	20.0	40.4
Relationship status	100.0	25.9	74.1
Healthy lifestyle factors, %
Physical activity (meeting recommendations)	58.5	57.5	58.9	0.151
TV viewing (≤14 hours/week)	41.9	39.7	42.7	0.001
Fruit and vegetable (meeting recommendations)	12.4	11.8	12.6	0.249
Fast food (none in the last week)	56.6	56.3	56.7	0.706
Smoking (non-smoker)	85.8	79.6	88.0	<0.001
Alcohol (meeting recommendations)	69.4	64.7	70.8	<0.001
BMI (normal weight)	37.9	42.1	36.6	<0.001