Table 4

Anthropometric, physical performance, and training factors for injury incidence and proportion of playing season missed

		Injury incidence rate (per 1000 hours)			Proportion of season missed
Factor	N	Rate	RR (95% CI)	p Value	Proportion	RR (95% CI)	p Value
Height (cm)
<174 cm (Reference)	46	70	1.00		0.08	1.00
174 to 178 cm	53	67	0.96 (0.60 to 1.54)	0.86	0.11	1.39 (0.69 to 2.81)	0.34
179 to 181 cm	50	95	1.40 (0.90 to 2.18)	0.12	0.16	2.04 (1.05 to 3.97)	0.03
182 to 185 cm	46	84	1.24 (0.78 to 1.97)	0.36	0.14	1.72 (0.85 to 3.46)	0.12
>185 cm	53	93	1.38 (0.90 to 2.13)	0.12	0.09	1.10 (0.53 to 2.29)	0.78
Body mass (kg)
<74 kg (Reference)	50	56	1.00		0.10	1.00
74 to 80 kg	52	80	1.50 (0.93 to 2.41)	0.08	0.11	1.16 (0.59 to 2.26)	0.66
81 to 87 kg	46	92	1.77 (1.09 to 2.86)	0.02	0.17	1.85 (0.98 to 3.49)	0.05
87 to 94 kg	51	89	1.70 (1.08 to 2.68)	0.02	0.11	1.09 (0.56 to 2.13)	0.79
>94 kg	49	95	1.81 (1.15 to 2.87)	0.01	0.11	1.09 (0.55 to 2.17)	0.79
Body mass index (BMI)
<23 (Reference)	40	55	1.00		0.14	1.00
23 to 25	56	72	1.34 (0.80 to 2.24)	0.25	0.10	0.68 (0.35 to 1.32)	0.24
25 to 26.5	58	83	1.58 (0.96 to 2.59)	0.06	0.14	1.03 (0.56 to 1.89)	0.93
26.5 to 28	44	103	2.02 (1.22 to 3.34)	<0.01	0.11	0.81 (0.41 to 1.59)	0.53
>28	50	94	1.82 (1.11 to 2.96)	0.01	0.09	0.64 (0.32 to 1.26)	0.18
Sum of six skinfolds (mm)
<48.2 (Reference)	48	66	1.00		0.12	1.00
48.2 to 57.9	49	76	1.16 (0.73 to 1.88)	0.51	0.13	1.08 (0.57 to 2.04)	0.80
58.0 to 70.5	48	97	1.54 (0.97 to 2.42)	0.06	0.13	1.14 (0.60 to 2.14)	0.69
70.6 to 87.7	47	74	1.14 (0.71 to 1.85)	0.58	0.12	1.04 (0.54 to 2.00)	0.91
>87.7	50	95	1.51 (0.97 to 2.35)	0.06	0.08	0.67 (0.33 to 1.34)	0.25
Aerobic endurance (20 m multistage shuttle run test - repeats)
<97 (Reference)	47	75	1.00		0.11	1.00
97 to 105	48	70	0.91 (0.57 to 1.46)	0.70	0.13	1.16 (0.60 to 2.23)	0.65
106 to 117	47	80	1.06 (0.67 to 1.67)	0.80	0.12	1.03 (0.53 to 2.01)	0.93
118 to 128	48	99	1.36 (0.89 to 2.08)	0.15	0.10	0.88 (0.45 to 1.73)	0.71
>128	52	82	1.09 (0.70 to 1.70)	0.69	0.12	1.00 (0.52 to 1.96)	0.98
Anaerobic endurance (high intensity shuttle run test)
>83 (Reference)	47	71	1.00		0.11	1.00
65 to 83	49	70	0.97 (0.61 to 1.56)	0.92	0.13	1.23 (0.64 to 2.38)	0.53
51 to 64	47	98	1.42 (0.91 to 2.26)	0.11	0.15	1.49 (0.78 to 2.85)	0.22
37 to 50	47	86	1.25 (0.79 to 1.97)	0.34	0.13	1.20 (0.61 to 2.37)	0.58
<37	46	86	1.24 (0.80 to 1.94)	0.33	0.08	0.73 (0.35 to 1.56)	0.41
30 m sprint time (seconds)
>4.06 (Reference)	48	85	1.00		0.11	1.00
3.96 to 4.06	41	62	0.70 (0.44 to 1.13)	0.13	0.09	0.83 (0.40 to 1.70)	0.60
3.85 to 3.95	49	79	0.92 (0.60 to 1.40)	0.70	0.11	0.99 (0.52 to 1.91)	0.98
3.76 to 3.84	41	67	0.76 (0.48 to 1.24)	0.27	0.11	1.00 (0.49 to 2.06)	0.99
<3.76	39	121	1.51 (0.99 to 2.30)	0.05	0.17	1.66 (0.87 to 3.19)	0.11
Vertical jump (cm)
<53.9 (Reference)	46	87	1.00		0.13	1.00
53.9 to 58.2	48	83	0.95 (0.61 to 1.49)	0.82	0.12	0.91 (0.48 to 1.72)	0.76
58.3 to 61.0	46	73	0.82 (0.52 to 1.30)	0.39	0.07	0.51 (0.25 to 1.06)	0.07
61.1 to 65.0	47	79	0.90 (0.57 to 1.41)	0.64	0.10	0.75 (0.38 to 1.45)	0.38
>65.0	47	92	1.06 (0.68 to 1.66)	0.80	0.16	1.22 (0.66 to 2.24)	0.52
Push ups (number)
<20 (Reference)	39	74	1.00		0.06	1.00
20 to 23	49	83	1.13 (0.71 to 1.82)	0.59	0.15	2.69 (1.24 to 5.84)	0.01
24 to 28	50	83	1.13 (0.71 to 1.80)	0.60	0.13	2.30 (1.06 to 5.03)	0.03
29 to 33	51	95	1.33 (0.84 to 2.11)	0.22	0.12	2.19 (0.99 to 4.81)	0.05
>33	40	66	0.88 (0.52 to 1.48)	0.61	0.09	1.49 (0.62 to 3.55)	0.36
Endurance training load
0 (Reference)	60	70	1.00		0.13	1.00
1 to 9	72	80	1.17 (0.78 to 1.74)	0.44	0.10	0.74 (0.42 to 1.33)	0.31
10 to 14	54	98	1.46 (0.97 to 2.21)	0.06	0.10	0.74 (0.40 to 1.39)	0.34
15 to 20	30	87	1.29 (0.78 to 2.12)	0.31	0.17	1.34 (0.70 to 2.57)	0.37
>20	27	77	1.12 (0.67 to 1.88)	0.65	0.12	0.92 (0.44 to 1.90)	0.81