Table 5 Relationship between provision of data required to calculate NNS and RCT characteristics
From: The external validity of published randomized controlled trials in primary care
Characteristics | Data required to calculate NNS provided in report, n(%) | Odds Ratio (95% CI) | P Value | |
|---|---|---|---|---|
NO | YES | |||
(n = 45) | (n = 103) | |||
Journal | 0.37 | |||
BMJ | 14 (31) | 44 (43) | - | |
British Journal of General Practice | 15 (33) | 31 (30) | 0.66 (0.28 to 1.56) | |
Family Practice | 7 (16) | 17 (16) | 0.77 (0.27 to 2.24) | |
Journal of Family Practice | 9 (20) | 11 (11) | 0.39 (0.13 to 1.13) | |
Number of enrolees | 0.09 | |||
<100 | 8 (18) | 40 (39) | - | |
110–260 | 20 (44) | 31 (30) | 0.31 (0.12 to 0.80) | |
260–650 | 9 (20) | 15 (15) | 0.33 (0.11 to 1.02) | |
>650 | 8 (18) | 17 (16) | 0.42 (0.14 to 1.32) | |
Multicentre | 0.45 | |||
Multiple | 33 (73) | 83 (81) | - | |
Single | 11 (24) | 16 (16) | 0.58 (0.24 to 1.38) | |
Unclear | 1 (2) | 3 (3) | 1.19 (0.12 to 11.88) | |
Funding Source | ||||
Charity | 5 (11) | 10 (10) | - | |
Governing body | 2 (4) | 3 (3) | 0.75 (0.09 to 6.04) | |
Government | 11 (24) | 55 (53) | 2.5 (0.71 to 8.76) | |
Pharmaceutical Industry | 7 (16) | 8 (8) | 0.57 (0.13 to 2.50) | |
Other | 5 (11) | 9 (9) | 0.9 (0.19 to 4.17) | |
Not Listed | 15 (33) | 18 (17) | 0.6 (0.17 to 2.14) | |
Intervention Studied | 0.02 | |||
Counselling/Lifestyle | 3 (7) | 8 (8) | - | |
Decision Support aids | 1 (2) | 6 (6) | 2.25 (0.18 to 27.37) | |
Educational | 5(11) | 21 (21) | 1.56 (0.30 to 8.17) | |
Pharmaceutical therapy | 14 (32) | 9 (9) | 0.24 (0.05 to 1.16) | |
Surgery/procedure | 0 (0) | 3 (3) | undefined | |
Other | 21 (48) | 55 (54) | 0.98 (0.24 to 4.06) | |