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Table 4 Log-binomial regression models of outcomes

From: A targeted promotional DVD fails to improve Māori and Pacific participation rates in the New Zealand bowel screening pilot: results from a pseudo-randomised controlled trial

  Variable Kit return rate outcome   Spoiled kit rate outcome
  Relative risk Confidence limits P   Relative risk Confidence interval p
Māori Sent DVD 0.54 0.45–0.65 < 0.001   0.40 0.25–0.63 < 0.001
  Sex (male) 1.22 1.05–1.43 0.011   1.10 0.83–1.45 0.514
  Age Group    0.351     0.072
  50–54 1.00     1.00   
  55–59 1.03 0.85–1.25 0.771   0.89 0.64–1.22 0.457
  60–64 1.17 0.94–1.46 0.149   0.66 0.42–1.05 0.077
  65–69 0.95 0.72–1.26 0.730   0.50 0.26–0.97 0.040
  70+ 1.27 0.93–1.74 0.136   0.48 0.21–1.10 0.083
  Deprivation quintile   < 0.001     0.589
  Q1 (least) 1.00     1.00   
  Q2 0.82 0.65–1.04 0.110   0.98 0.66–2.17 0.950
  Q3 0.66 0.52–0.84 0.001   1.39 0.58–1.66 0.161
  Q4 0.48 0.37–0.61 < 0.001   1.24 0.88–2.19 0.381
  Q5 (most) 0.46 0.35–0.62 < 0.001   1.38 0.77–2.11 0.209
  Missing 0.58 0.43–0.78 < 0.001   1.20 0.83–2.30 0.543
  Constant 0.35 0.29–0.43 < 0.001   0.32 0.21–0.49 < 0.001
Pacific Sent DVD 0.55 0.46–0.67 < 0.001   0.50 0.35–0.71 < 0.001
  Sex (male) 1.09 0.91–1.30 0.318   1.02 0.79–1.32 0.863
  Age Group    0.072     
  50–54 1.00     1.00   
  55–59 1.05 0.84–1.43 0.674   1.04 0.73–1.47 0.844
  60–64 1.29 0.99–1.72 0.044   1.05 0.73–1.52 0.785
  65–69 1.40 1.01–1.86 0.014   1.05 0.71–1.55 0.808
  70+ 1.21 0.88–1.67 0.242   1.20 0.79–1.83 0.384
  Deprivation quintile   < 0.001     
  Q1 (least) 1.00     1.00   
  Q2 0.53 0.36–0.78 0.001   0.72 0.35–1.48 0.373
  Q3 0.50 0.36–0.69 < 0.001   1.08 0.62–1.87 0.788
  Q4 0.49 0.37–0.66 < 0.001   1.26 0.77–2.07 0.364
  Q5 (most) 0.53 0.40–0.72 < 0.001   1.31 0.79–2.17 0.296
  Missing 0.35 0.23–0.53 < 0.001   0.92 0.44–1.91 0.817
  Constant 0.30 0.22–0.40 < 0.001   0.35 0.21–0.57 < 0.001
  1. Note: Age group was a significant predictor of test kit return as a continuous variable for Pacific but not Māori and a significant predictor of non-Spoiled kit return in Māori but not Pacific (results not shown)