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Table 5 Illness rate per 1000 h of physical activity and comparison of illness rates per group

From: Sports participation related to injuries and illnesses among ambulatory youth with chronic diseases: results of the health in adapted youth sports study

Group comparisonsMean minutes PA per day
(range min-max)
Cumulative hours of PA during 1 year per groupNumber of illnesses
(95% CI)
Illness rate
(95% CI)
IRD
(95% CI)
IRR
(95% CI)
p-value
Group 0
(non-sports) +
group 1
(sports 1x/wk)
Vs. Group 2
(sports ≥2x/wk)
134.6 (59–244)
171.8 (73–292)
19,693
44,937
37 (26.1 to 51)
53 (39.7 to 69.3)
1.88
(1.4 to 1.2)
1.18 (1.1 to 1.6)
IRD = 0.7 (0.07 to 1.31)
IRR = 1.6 (1.0 to 2.5)
0.028*
Group 0
(non-sports)
Vs. Group 1
(sports 1x/wk)
146.2 (80–244)
123.6 (59–182)
10,674
9019
20 (12.2 to 30.9)
17 (9.9 to 27.2)
1.87 (1.9 to 1.3)
1.88 (1.9 to 1.3)
IRD = − 1.12 (− 1.23 to 1.20)
IRR = 0.99 (0.5 to 2.0)
0.986
Group 1
(sports 1x/wk)
Vs. Group 2
(sports ≥2x/wk)
123.6 (59–182)
171.8 (73–292)
9019
44,937
17 (9.9 to 27.2)
53 (39.7 to 69.3)
1.88 (1.9 to 1.3)
1.18 (1.1 to 1.6)
IRD = 0.7 (−0.1 to 1.5)
IRR = 1.59 (0.9 to 2.8)
0.090
Group 2
(sports ≥2x/wk)
Vs. Group 0
(non-sports)
171.8 (73–292)
146.2 (80–244)
44,937
10,674
53 (39.7 to 69.3)
20 (12.2 to 30.9)
1.18 (1.1 to 1.6)
1.87 (1.9 to 1.3)
IRD = 0.7 (1.5 to 0.1)
IRR =0.63 (0.4 to 1.1)
0.075
  1. PA physical activity, CI confidence interval, vs versus, IRD incidence rate difference, IRR incidence rate ratio, * significant difference p-value ≤0.05