Table 3.
Injury rates and pair-wise comparison chi square statistic for boxing, wrestling, and martial arts.
Injury rates per 100,000 player-days (95% Confidence Interval)
Pearson’s chi square p-values
Injury
Boxing
Wrestling
Martial arts
Boxing vs. wrestling
Boxing vs. martial arts
Wrestling vs. martial arts
Concussions
.92 (.5-1.3)
1.20 (.8-1.5)
.07 (.03-.10)
.34
<.001
*
<.001
*
Contusions/ Abrasions
7.9 (6.4-9.3)
6.4 (4.8-7.9)
1.35 (1.0-1.6)
.16
<.001
*
<.001
*
Dislocations
1.1 (.7-1.4)
2.4 (1.7-2.9)
.23 (.1-0.3)
<.001
*
<.001
*
<.001
*
Fractures
7.7 (6.4-8.9)
8.5 (6.5-10.4)
1.42 (1.0-1.7)
.45
<.001
*
<.001
*
Lacerations
2.5 (1.6-3.3)
2.4 (1.7-3.0)
.26 (.1-0.3)
.85
<.001
*
<.001
*
Internal organ injuries
.82 (.3-1.3)
1.02 (.6-1.3)
.11 (.07-.15)
.57
<.001
*
<.001
*
Strains/Sprains
5.91
14.52
1.81
<.001
*
<.001
*
<.001
*
Total
29.0 (24.4-33.4)
39.9 (31.6-48.1)
5.8 (4.5-7.1)
.003
*
<.001
*
<.001
*
* statistically significant difference between the two compared groups.