Table 1.

Characteristics of participants

	N	Measurement	Values (95% CI)
Socio-demographic
Age	1905	> 65 years	26.4% (24.4–28.4%)
Gender	1905	Women	49.4% (47.2–51.7%)
Married	1905	Yes	76.9% (75.0–78.8%)
Educational level	1905	Low (ISCED 1)	25.9% (23.9–27.8)
		Medium (ISCED 2,3,4)	29.4% (27.3–31.4%)
		High (ISCED 5,6)	44.7% (42.5–47.0%)
Social class	1897	High	5.0% (23.0–27.0%)
		Medium-high	33.2% (31.1–35.3%)
		High	24.9% (22.9–26.8%)
		Medium-low	16.1% (14.5–17.8%)
		Low	0.8% (0.4–1.2%)
Household income	1902	< €1150/month	7.3% (6.1–8.5%)
		€1151–1800/month	15.1% (13.5–16.7%)
		€1801–2600/month	24.7 (22.7–26.6%)
		> €2600/month	52.9 (50.1–55.2%)
Health condition
Self-perceived health	1905	Bad	0.6% (0.2–0.9%)
		Moderate	15.7% (14.1–17.4%)
		Medium	53.3% (51.1–55.6%)
		Very good	25.0% (23.1–27.0%)
		Excellent	0.5% (0.4–0.6%)
Visited their family doctor	1905	Yes	25.0% (23.0–26.9%)
Visited a specialized doctor	1905	Yes	14.2% (12.7–15.8%)
Previous surgeries	1905	Yes	75.8% (73.9–77.8%)

95% CI: confidence interval 95%