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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)