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Table 2 Pre- and post-intervention descriptive statistics of primary and secondary outcomes by intervention group

From: Looking inside the black box: results of a theory-based process evaluation exploring the results of a randomized controlled trial of printed educational messages to increase primary care physicians’ diabetic retinopathy referrals [Trial registration number ISRCTN72772651]

 

Intention

Attitude

Subjective norm

PBC

Mean ( SD)

Mean ( SD)

Mean ( SD)

Mean ( SD)

Experimental factors

N

Pre-inter

Post-inter

Pre-inter

Post-inter

Pre-inter

Post-inter

Pre-inter

Post-inter

No Insert

No Outsert

No patient reminder

72

6.32 (1.15)

6.24 (1.18)

6.15 (1.11)

6.15 (1.16)

6.14 (1.30)

6.23 (1.03)

6.14 (1.07)

6.06 (1.12)

Outsert

No patient reminder

73

6.40 (0.95)

6.38 (1.00)

6.32 (0.81)

6.29 (0.84)

6.12 (1.07)

6.24 (0.88)

6.27 (0.97)

6.38 (0.73)

Patient reminder

76

6.21 (1.37)

6.33 (1.12)

6.30 (0.98)

6.10 (1.18)

6.02 (1.37)

6.17 (1.21)

6.05 (1.22)

6.14 (1.07)

Insert

No Outsert

No patient reminder

73

6.10 (1.43)

6.03 (1.48)

5.92 (1.25)

6.18 (1.05)

5.78 (1.55)

5.80 (1.59)

5.87 (1.24)

6.07 (1.05)

Outsert

No patient reminder

76

6.31 (1.23)

6.20 (1.41)

6.15 (1.03)

6.11 (1.13)

6.11 (1.18)

6.04 (1.33)

5.92 (1.27)

5.92 (1.20)

Patient reminder

67

6.40 (1.06)

6.15 (1.53)

6.22 (0.99)

6.15 (1.16)

6.27 (1.01)

5.99 (1.40)

6.02 (1.17)

5.97 (1.29)

  1. Note. PBC, Perceived Behavioral Control; Pre-inter, Pre-intervention survey; Post-inter, Post-intervention survey.