Table 5

Theory of Planned Behavior Predictors (n = 427)

MDs willing Rx

(n = 267)

MDs not willing

(n = 160)

unadj OR

95% CI

adj OR*

95% CI

Measures

n

%

n

%

(n = 425 for model)

Attitude Scale (3 item)

2.45

2.05–2.94

1.81

1.47–2.22

> = 50

200

75.2%

33

20.6%

(chisq = 31.9)

<50

66

24.8%

127

79.4%

2.24

1.87–2.70

1.53

1.23 – 1.89

Subjective Norms Scale (4 item)

= 50

203

76.6%

56

35.0%

(chisq = 14.7)

<50

62

23.4%

104

65.0%

2.93

2.36–3.65

2.00

1.59 – 2.51

Perceived Control Scale (4 item)

> = 50

206

77.7%

33

20.6%

(chisq = 35.4)

<50

59

22.3%

127

79.4%

*odds ratio and 95% CI are for a 10 point increase in the scale

ROC for model = .902

Macalino et al. Substance Abuse Treatment, Prevention, and Policy 2009 4:13   doi:10.1186/1747-597X-4-13