9 Appendix B (continued)
9.2 Attrition from baseline to wave 2
Comparing the baseline data for Māori participants completing wave 2 with those Māori only completing the baseline (henceforth “wave 2 dropouts”) shows that there was no significant change in participant mean age or the proportion of Māori participants who were female, partnered, living in urban vs. rural centres. However, compared to wave 2 completers, the Māori wave 2 dropouts were significantly less likely to be working (Χ2(1, 2864) = 4.84, p<0.028, Φ = .04), less educated (χ2(3, 2680) = 71.83, p<0.001, Φ = .16), had significantly lower living standards (χ2(2, 1815) = 13.48, p<0.001, Φ = .09), were in poorer health (χ2(2, 3031) = 22.31, p<0.001, Φ = .09), were more likely to smoke (χ2(1, 3051) = 11.88, p<0.001, Φ = .06) though consumed alcohol less frequently (χ2(4, 3077) = 21.21, p<0.001, Φ = .08).
Comparing non-Māori wave 2 completers with wave 2 dropouts shows that there was no change in the proportion of non-Māori who were female, partnered, living in urban vs. rural centres, or in participants' living standards. However, compared to wave 2 completers, non-Māori wave 2 dropouts were slightly older (t(3378) = -.83, p<.035), were significantly less likely to be working (χ2 (1, 3382) = 13.27, p<0.001, Φ = .06), less educated (χ2(3, 3043) = 52.45, p<0.001, Φ = .13), were in poorer health (χ2 (2, 3511) = 18.50, p<0.001, Φ = .07), were more likely to smoke (χ2(1, 3476) = 5.36, p<0.021, Φ = .04), though consumed alcohol less frequently (χ2(4, 3507) = 22.66, p<0.001, Φ = .08).
9.3 Attrition from wave 2 to wave 3
Comparing Māori participants who completed wave 3 with the Māori wave 3 dropouts revealed that there were no significant changes in mean age or the proportion of participants who were female, working, and living in urban vs. rural centres. Nor was there any difference in the distribution of participants across levels of education and living standards, or in the frequency of drinking. However, in comparison to wave 3 completers, wave 3 dropouts were significantly less likely to be partnered (χ2(1, 1061) = 5.95, p<0.015, Φ = .08), were in poorer health (χ2(2, 1058) = 7.81, p<0.05, Φ = .09), and more likely to smoke (χ2(1, 1053) = 7.17, p<0.01, Φ = .08).
Comparing non-Māori participants who completed wave 3 with the non-Māori wave 3 dropouts revealed that there were no significant changes in the proportion of participants who were partnered, working, living in urban vs. rural centres. Nor was there any difference in the distribution of participants across levels of living standards and health. However, in comparison to wave 3 completers, wave 3 dropouts were significantly more likely to be men (χ2(1, 1378) = 4.14, p<0.05, Φ = .06) and smokers (χ2(1, 1394) = 6.31, p<0.05, Φ = .07), less likely to be educated (χ2(3, 1230) = 8.18, p<0.05, Φ = .08), and had slightly lower frequency of alcohol consumption (χ2(4, 1399) = 10.66, p<0.05, Φ = .09).
