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Table 4 Injury rate and rate ratios by age, position of play and BMI

From: Match injuries in amateur Rugby Union: a prospective cohort study - FICS Biennial Symposium Second Prize Research Award

  N Percent (95 % CI) IIRMHE (95 % CI) RRMHE (95 % CI)
Age     
 18–24 89 69 (61–77) 52.6 (42.2–64.7) ref.
 25–34 36 27.9 (20.2–35.6) 51.8 (36.3–71.7) 0.99 (0.67–1.45)
 ≥35 4 3.1 (0.1–6.1) 51.4 (14.0–131.6) 0.98 (0.37–2.56)
Year of participation     
 ≤10 years 79 61.2 (52.8–69.6) 52.8 (41.8–65.8) ref.
 >10 years 50 38.8 (30.4–47.2) 51.6 (38.3–68.0) 0.69–1.39
Position     
 Forward 67 51.9 (43.3–60.6) 52.2 (40.5–66.3) ref.
 Backs 62 48.1 (39.4–56.7) 52.4 (40.2–67.2) 1.00 (0.71–1.42)
BMI     
 <25 48 39.3 (30.7–48) 58.7 (43.3–77.9) ref.
 25 to 30 58 47.5 (38.7–56.4) 50.4 (38.3–65.1) 0.86 (0.59–1.25)
 >30 16 13.1 (7.1–19.1) 40.0 (22.8–64.9) 0.68 (0.39–1.19)
SF-36v2 PCS     
 NBS <47 56 43.4 (34.9–52) 54.7 (41.3–71.1) 1.05 (0.70–1.58)
 NBS 47–53 40 31 (23–39) 51.9 (37.1–70.7) ref.
 NBS >53 33 25.6 (18.1–33.1) 49.1 (33.8–69.0) 0.95 (0.60–1.49)
SF-36v2 MCS     
 NBS <47 38 29.5 (21.6–37.3) 53.7 (38.0–73.7) 0.93 (0.57–1.50)
 NBS 47–53 28 21.7 (14.6–28.8) 57.9 (38.5–83.7) ref.
 NBS >53 63 48.8 (40.2–57.5) 49.5 (38.0–63.3) 0.85 (0.55–1.33)
  1. MHE /1000 match-hours exposure, BMI body mass index, PCS physical component summary, MCS mental component summary, NBS norm-based score