Table 1 Outcome reporting in 200 randomized trials
From: Is the relationship among outcome variables shown in randomized trials?
Trial outcomes (n = 200) | |
|---|---|
Primary outcome stated explicitly | 198 |
Number of primary outcomes: mean, median, (range) (IQR) | 2.2, 1, (1, 19) (1, 3) |
Papers with one primary outcome: N (%) | 114 (57%) |
Number of secondary outcomes: mean, median, (range) (IQR) | 3.8, 3, (0, 25) (0, 5) |
Number of harms: mean, median, (range) (IQR) | 2.4, 0, (0, 21) (0, 3) |
Papers with more than one outcome: N (%) | 184 (92%) |
Comparisons among outcomes (n = 184) | |
Number of papers with comparisons between outcomes | 2 |
Total number of comparisons between outcomes | 28 |
Type of comparison | |
Primary versus primary | 1 |
Primary versus secondary | 11 |
Primary versus harm | 6 |
Secondary versus secondary | 4 |
Secondary versus harm | 6 |
Harm versus harm | 0 |
Composite primary outcomes: N (%) | 33 (17%) |
Number of items in composites: mean, median (range) (IQR) | 4.7, 3, (2, 21) (2, 5) |
Number of papers showing individual elements: N (%) | 32/33 (97%) |
Number of individual elements shown: N (%) | 152/155 (98%) |
Individual elements compared to other individual elements | 0 |