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Table 1 Incidence of injuries in semi-professional football players in Nigeria

From: Injuries in male and female semi-professional football (soccer) players in Nigeria: prospective study of a National Tournament

Variable Males Females
All injuries
 No of injuries 116 50
 Match exposure (hours) 1023 759
 Injuries per match (95% CI) 3.7 (3.1–4.5) 2.2 (1.6–2.9)
 Injuries per 1000 h (95% CI) 113.4 (93.7–136.0) 65.9 (48.9–86.8)
 IRR (95% CI) 1.72 (1.23–2.45)* Reference
Time-loss injuries
 No of injuries 16 6
 Injuries per match (95% CI) 0.5 (0.3–0.8) 0.3 (0.1–0.6)
 Injuries per 1000 h (95% CI) 15.6 (8.9–25.4) 7.9 (2.9–17.2)
 IRR (95% CI) 1.98 (0.74–6.17) Reference
  1. IRR incidence rate ratio
  2. * Significant at p < 0.01