Table 1

Demographic information of those accepting participation

Intervention group
(n=751)
Control group
(n=750)
P value
Site Cairns/Mackay250/501500/250
Female gender, n (%)422 (56)415 (55)0.76
Age in years, mean (SD)42 (17)41 (17)0.29
Socioeconomic index,* mean (SD)56 (15)51 (17)3.3×10-10
  • *An Australian index of socioeconomic standard linked to postal code. Varies between 0 (lowest standard) and 100 (best standard). The Australian average is 50.