Table 2

Incidence rates, event-related time loss and effectiveness estimates (Spraino vs control)

Spraino
(n=256)
Control
(n=254)
Spraino versus Control
DifferenceRatio*
Total exposure (hours)18 80314 185
Events (151)
 Number8170 Embedded Image
 Incidence rate†4.30 (3.30 to 5.30)4.93 (3.68 to 6.18)−0.62 (−2.24 to 0.99)0.87 (0.62 to 1.23)
 Time loss (weeks)1.8 (1.3 to 2.3)2.8 (2.2 to 3.4)−1.0 (−1.8 to −0.2)0.63 (0.44 to 0.92)
Non-contact events (96)
 Number4452
 Incidence rate†2.33 (1.67 to 3.00)3.67 (2.54 to 4.77)−1.38 (−2.74 to −0.02)0.64 (0.42 to 0.98)
 Time loss (weeks)1.9 (1.1 to 2.7)2.7 (2.0 to 3.4)−0.9 (−2.0 to 0.2)0.67 (0.41 to 1.10)
Severe events (50)
 Number1931
 Incidence rate†1.01 (0.51 to 1.50)2.20 (1.36 to 3.04)−1.17 (−2.13 to −0.20)0.47 (0.25 to 0.88)
Non-contact severe events (34)
 Number1222
 Incidence rate†0.63 (0.25 to 1.02)1.56 (0.82 to 2.30)−0.89 (−1.74 to −0.04)0.43 (0.19 to 0.97)
In-trial recurrent events (19)
Total exposure (hours)18891428
 Number109
 Incidence rate†5.27 (1.68 to 8.85)6.29 (1.81 to 10.8)−0.99 (−6.81 to 4.84)0.85 (0.32 to 2.24)
 Time loss (weeks)1.1 (0.5 to 1.7)3.5 (2.1 to 4.86)−2.3 (−3.7 to −0.9)0.33 (0.15 to 0.72)
  • Numbers in parenthesis represent 95% CIs.

  • Spraino versus control, ratio <1 indicates preventive effect.

  • *Incidence rate ratio or relative time-loss duration.

  • †Per 1000 hours of participation in primary sport.