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Table 3 Results of logistic regression predicting response from incentive amount, survey length and type of cancer

From: Response rates to a mailed survey of a representative sample of cancer patients randomly drawn from the Pennsylvania Cancer Registry: a randomized trial of incentive and length effects

Variable

Results of logistic regression

 

B

SE

Wald

Odds Ratio

95% CI

p-value

Incentive ($3)

-0.01

0.12

0.01

0.99

(0.78-1.25)

0.92

Survey Length (short)

-0.23

0.12

3.48

0.79

(0.63-1.01)

0.06

Prostate cancer (Colon)

0.81

0.15

28.81

2.24

(1.68-3.02)

< 0.01

Breast cancer (Colon)

0.95

0.15

39.26

2.59

(1.93-3.47)

< 0.01

   Constant

0.01

0.14

.01

1.01

(0.77-1.33)

0.92

   Cox and Snell R 2

0.043

     
  1. an = 1150
  2. b Reference category is in parentheses.
  3. cSignificant differences in response for type of cancer hold when controlling for age, race, marital status and stage of cancer.