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Table 1 Effect of incentive timing on physician cooperation rate, overall and by demographic characteristics

From: Risks and rewards of using prepaid vs. postpaid incentive checks on a survey of physicians

Characteristic

Cooperation rate (%) for prepaid group (n = 2426)

Cooperation rate (%) for postpaid group (n = 953)

Delta

Chi-squared statistic, degrees of freedom, p-value

Total

41.4 (1004)

29.1 (277)

12.3

46.8, 1, < 0.0001

Region

 Midwest

44.3 (233)

36.0 (74)

8.3

4.2, 1, 0.0406

 Northeast

41.3 (240)

30.3 (70)

11.0

9.0, 1, 0.0028

 South

41.2 (356)

25.0 (85)

16.2

30.6, 1, < 0.0001

 West

38.7 (175)

27.5 (48)

11.2

7.5, 1, 0.0064

Metropolitan statistical area size

 Very large

41.3 (718)

29.5 (201)

11.8

30.6, 1, < 0.0001

 Large

43.5 (141)

26.5 (34)

17.0

12.4, 1, 0.0005

 Small/medium

40.1 (145)

29.5 (42)

10.6

5.2, 1, 0.0237

Specialty

 Hematology

39.2 (82)

26.7 (20)

12.5

4.0, 1, 0.0478

 Hematology- oncology

40.5 (612)

28.3 (166)

12.2

29.2, 1, < 0.0001

 Oncology

44.0 (310)

31.4 (91)

12.6

14.1, 1, 0.0002

Gender and Age

 Female

37.5 (282)

24.9 (71)

12.6

16.2, 1, 0.0001

 Male under age 55

43.1 (421)

30.2 (118)

12.9

20.6, 1, < 0.0001

 Male age 55 or older

43.4 (301)

32.0 (88)

11.4

11.0, 1, 0.0009