Table 5.

Comparison of socio-demographic characteristics of the sample with the reference population n (%)

Characteristic	Sample	Reference population*
Gender
Female	179 (60.1)	2551 (50.70)
Male	119 (39.9)	2480 (49.30)
Age group
15 - 24	42 (14.10)	478 (11.38)
25 - 64	185 (62.10)	2789 (66.39)
65 or more	71 (23.80)	934 (22.23)

*Notes: Censos 2011 - Resultados Definitivos Alentejo, Instituto Nacional de Estatística. Portugal. Available at: http://www.ine.pt. The age group <15 years was not considered because it was na exclusion criteria of the study. Therefore data presented assumes that 100% of the reference population is over 15 years of age.