Table 2.

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

	Spraino (n=256)	Control (n=254)	Spraino versus Control
			Difference		Ratio*
Total exposure (hours)	18 803	14 185
Events (151)
Number	81	70
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)
Number	44	52
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)
Number	19	31
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)
Number	12	22
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)	1889	1428
Number	10	9
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.