Table 2

 Demographic characteristics of the invited, participating, and non-participating populations

CharacteristicInvitedParticipatingNon-participatingParticipating v non-participating
SEIFA, Socioeconomic indicator for areas, Australian Bureau of Statistics (NB only first time offers included).
*Reason for initial inclusion not clear in 83 patients.
Sex (% female)53.453.453.4NS (χ2)
Age (y) (at invitation) (median [range] (mean))61 [23–95] (60.1)63 [28–89] (61.9)58 [23–95] (58.6)NS (Wilcoxon)
Median SES indicator (SEIFA rank)575461NS (Wilcoxon)
Reason for colorectal surveillance*
    Personal history10335384950.0001
    Family history525219306χ2