Table 4

Risk factors for injury in Calgary MMA athletes from January 2010 to December 2015

VariablesUnadjusted OR (95% CI)P valueAdjusted OR (95% CI)*P value
Set 1
Age (years)1.01 (0.98 to 1.05)0.451.01 (0.97 to 1.05)0.60
Sex
  FemaleReferenceReference
  Male1.28 (0.43 to 3.84)0.660.86 (0.24 to 3.06)0.82
Weight (pounds)1.01 (1.00 to 1.02)0.011.00 (1.00 to 1.01)0.35
Bout length (seconds)0.999 (0.999 to 1.00)0.101.001 (1.000 to 1.002)0.29
How bout finished
  SubmissionReferenceReference
  KO/TKO10.65 (6.42 to 17.68)<0.0110.08 (5.99 to 16.96)<0.01
  Decision1.80 (0.98 to 3.35)0.061.36 (0.62 to 2.99)0.45
  Other†4.74 (1.78 to 12.61)<0.013.76 (1.28 to 11.40)<0.01
Bout type
  Non-titleReferenceReference
  Title1.68 (0.89 to 3.19)0.111.18 (0.84 to 3.80)0.13
Set 2
Referee
 <50 bouts experienceReferenceReference
 ≥50 bouts experience0.92 (0.62 to 1.36)0.670.98 (0.60 to 1.60)0.04
Country of origin
  CanadaReferenceReference
  Non-Canadian2.46 (1.50 to 4.04)<0.012.30 (1.34 to 3.93)<0.01
Prior experience (number)1.02 (1.00 to 1.05)0.061.00 (0.97 to 1.03)0.94
Level of competition
  AmateurReferenceReference
  Professional1.46 (1.01 to 2.10)0.041.37 (0.87 to 2.14)0.18
Matchmaker
  OthersReferenceReference
  Dominant matchmaker0.83 (0.57 to 1.22)0.350.86 (0.54 to 1.38)0.54
  • *Multivarible logistic regression of injured to non-injured after controlling for other variables in the set.

  • †Other included corner stoppage, draw, no context, and physician stoppage.

  • KO, knockout; MMA, mixed martial arts; TKO, technical knockout.