Table 1

Sports adverts study quality

Study componentN=74% (95% CI)
Number of participants2031 (median 15)Range 5–387
Number of men131064.5 (61.9 to 67.1)
Study quality
 Control group5574.3 (62.8 to 85.9)
 Randomisation4358.1 (43.4 to 72.9)
 Allocation concealment56.8 (0 to 28.8)
 Intention to treat2229.7 (10.8 to 48.8)
 Blinding (investigators, outcome assessors or participants)2027.0 (7.6 to 46.5)
 Surrogate sports outcome6182.4 (72.9 to 92.0)
 Repeat of the intervention22.7 (0 to 25.2)
Reporting
 Clear hypothesis6689.2 (81.7 to 96.7)
 Power calculation45.4 (0 to 27.6)
 Adverse events reported66.8 (0 to 32.3)
 Study limitations discussed810.8 (0 to 32.3)
Level of evidence
 100
 23242.1 (25.0 to 59.2)
 33343.4 (26.5 to 60.3)
 4 or 5911.8 (0 to 33.0)