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Table 5 Per-protocol analysis of change in test ordering rates for each topic

From: Effect of audit and feedback with peer review on general practitioners’ prescribing and test ordering performance: a cluster-randomized controlled trial

 

Intervention

control

    

Clinical topic

n

Mean before (SD)

Mean after (SD)

n

Mean before (SD)

Mean after (SD)

Ba (95% CI)

icc

Direction

p

Anaemia

35

176.8 (172.2)

209.4 (174.6)

53

199.6 (146.3)

232.5 (177.7)

−9.1 (−96.1, 77.9)

0.60

↓

0.829

Rheumatic complaints

39

13.3 (22.9)

11.6 (20.7)

49

12.9 (16.2)

14.9 (27.5)

3.2 (−8.1, 14.6)

0.55

↓

0.551b

Prostate complaints

26

34.7 (24.6)

30.4 (29.3)

62

39.1 (27.4)

41.8 (29.5)

6.9 (−0.7, 14.6)

0.07

↓

0.072

Chlamydia infections

30

11.4 (21.5)

14.7 (23.3)

58

7.4 (8.8)

5.8 (9.5)

−5.7 (−12.0, 0.5)

0.40

↑

0.069b

Thyroid dysfunction

29

204.8 (159.9)

191.3 (135.4)

59

163.3 (153.2)

191.7 (152.8)

36.6 (10.5, 62.7)

0.00

↓

0.007

Perimenopausal complaints

24

5.7 (5.5)

3.8 (3.5)

64

6.1 (6.7)

7.3 (8.0)

3.2 (0.1, 6.4)

0.10

↓

0.046b

  1. The desired direction of change is given in the column headed ‘direction’. Numbers represent the number of tests prescribed per 6 months per 1000 patients
  2. n = number of practices
  3. aAdjusted difference between groups at end of intervention, corrected for baseline
  4. bStatistically significant interaction
  5. Rheumatic complaints
  6. P10: B (95% CI):−3.0 (−13.9, 8.0). p: 0.560
  7. P90: B (95% CI): 14.8 (2.1, 27.4). p: 0.025
  8. Chlamydia infections
  9. P10: B (95% CI):−2.3 (−9.0, 4.4) p: 0.482
  10. P90: B (95% CI):−10.4 (−17.6,−3.3) p: 0.006
  11. Perimenopausal complaints
  12. P10: B (95% CI): 0.7 (−3.0, 4.5). p: 0.696
  13. P90: B (95% CI): 6.6 (2.4, 10.7). p: 0.002
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