Table 4 Proportion and mean days absent before time to return to sport for injuries among U.S. Rugby-7 s U19 players as a function of match activity and playing position (N = 69, 45 backs, 16 forwards)
All players | Backs (n = 45) | Â | Forwards (n = 16) | Â | All players (n = 69) | Â |
|---|---|---|---|---|---|---|
Risk factor | Proportion, % (95% CI) | Mean days absent (95% CI) | Proportion, % (95% CI) | Mean days absent (95% CI) | Proportion, % (95% CI) | Mean days absent (95% CI) |
Contact | 84.4 (70.1–92.6) | 38.8 (22.1–55.5) | 75 (45.7–91.4) | 31.7 (7.7–55.6) | 81.2 (69.9–88.9) | 37.4 (25.2–49.7) |
 Impact with player | 42.2 (28.3–57.5) | 44.3 (13.8–74.9) | 56.3 (29.8–79.6) | 36.9 (4.9–68.9) | 44.9 (33.4–57) | 42.5 (22.5–62.6) |
 Impact with ground | 8.9 (3.2–22.1) | 19 (0–38.7) | 12.5 (2.6–43) | 5 (0–30.4) | 10.1 (4.8–20.1) | 18 (4.4–31.6) |
 Impact w/player and ground | 33.3 (20.8–48.8) | 37.1 (15.9–58.4) | 6.3 (0.7–39.3) | 38 (–) | 26.1 (16.9–38) | 36.3 (18.9–53.6) |
Non-contact | 6.7 (2.1–19.4) | 13 (0–47.2) | 6.3 (0.7–39.3) | 3 (–) | 5.8 (2.1–14.8) | 10.5 (0–30.1) |
 Missing | 8.9 (3.2–22.1) | 37 (0–106) | 18.8 (5.3–48.6) | 27.7 (17.6-37.7) | 13 (6.8–23.5) | 34.6 (9.3–59.8) |
Phase of play | ||||||
 Maul | (–) | (–) | (–) | (–) | (–) | (–) |
 Ruck | (–) | (–) | 12.5 (2.6–43) | 57 (0–323.8) | 4.3 (1.4–13) | 39.3 (0–131.5) |
 Running/open play | 8.9 (3.2–22.1) | 33.3 (− 29.7–96.2) | 25 (8.6–54.3) | 21.5 (1.2–41.8) | 11.6 (5.8–21.8) | 27.4 (4–50.7) |
 Scrum | (–) | (–) | 6.3 (0.7–39.3) | 2 (–) | 1.4 (0.2–10) | 2 (–) |
 Tackle | 86.7 (72.7–94.1) | 37.6 (21.2–54) | 56.3 (29.8–79.6) | 29.3 (0–59.7) | 76.8 (65.1–85.5) | 37.2 (24.3–50) |
  Tackling | 58.1 (42.5–72.3) | 41.1 (15.6–66.6) | 50 (21–79) | 31.8 (5.5–58.2) | 57.4 (44.4–69.4) | 40.1 (21.6–58.6) |
  Tackled | 41.9 (27.7–57.5) | 34.6 (23.1–46.1) | 50 (21–79) | 36.5 (0–86.7) | 42.6 (30.6–55.6) | 34.6 (23–46.2) |
 Lineout | 2.2 (0.3–15.1) | 52 (–) | (–) | (–) | 1.4 (0.2–10) | 52 (–) |
 Missing | 2.2 (0.3–15.1) | 1(–) | (–) | (–) | 4.3 (1.4–13) | 30 (0–131.5) |
Removal from play | ||||||
 Immediate | 40 (26.4–55.3) | 33.6 (21.6–45.6) | 56.3 (29.8–79.6) | 25.2 (7.3–43.2) | 47.8 (36.1–59.8) | 33.9 (24.9–42.9) |
 Delayed | 42.2 (28.3–57.5) | 31.8 (13.9–49.8) | 18.8 (5.3–48.6) | 17.3 (0–60.2) | 34.8 (24.3–47) | 28.8 (14.4–43.2) |
 Not at all | (–) | (–) | 6.3 (0.7–39.3) | 24 (–) | 1.4 (0.2–10) | 24 (–) |
 Missing | 17.8 (8.9–32.4) | 56.5 (0–136.9) | 18.8 (5.3–48.6) | 54.3 (0–220.5) | 15.9 (8.9–26.9) | 55.9 (0–113.6) |
Injury onset | ||||||
 Acute | 100 (–) | 36.9 (22.4–51.5) | 100 (–) | 29.1 (11.5–46.7) | 100 (-) | 35.5 (25.1–45.9) |