Variables | Unadjusted OR (95% CI) | P value | Adjusted OR (95% CI)* | P value |
Set 1 | ||||
Age (years) | 1.01 (0.98 to 1.05) | 0.45 | 1.01 (0.97 to 1.05) | 0.60 |
Sex | ||||
Female | Reference | – | Reference | – |
Male | 1.28 (0.43 to 3.84) | 0.66 | 0.86 (0.24 to 3.06) | 0.82 |
Weight (pounds) | 1.01 (1.00 to 1.02) | 0.01 | 1.00 (1.00 to 1.01) | 0.35 |
Bout length (seconds) | 0.999 (0.999 to 1.00) | 0.10 | 1.001 (1.000 to 1.002) | 0.29 |
How bout finished | ||||
Submission | Reference | – | Reference | – |
KO/TKO | 10.65 (6.42 to 17.68) | <0.01 | 10.08 (5.99 to 16.96) | <0.01 |
Decision | 1.80 (0.98 to 3.35) | 0.06 | 1.36 (0.62 to 2.99) | 0.45 |
Other† | 4.74 (1.78 to 12.61) | <0.01 | 3.76 (1.28 to 11.40) | <0.01 |
Bout type | ||||
Non-title | Reference | – | Reference | – |
Title | 1.68 (0.89 to 3.19) | 0.11 | 1.18 (0.84 to 3.80) | 0.13 |
Set 2 | ||||
Referee | ||||
<50 bouts experience | Reference | – | Reference | – |
≥50 bouts experience | 0.92 (0.62 to 1.36) | 0.67 | 0.98 (0.60 to 1.60) | 0.04 |
Country of origin | ||||
Canada | Reference | – | Reference | – |
Non-Canadian | 2.46 (1.50 to 4.04) | <0.01 | 2.30 (1.34 to 3.93) | <0.01 |
Prior experience (number) | 1.02 (1.00 to 1.05) | 0.06 | 1.00 (0.97 to 1.03) | 0.94 |
Level of competition | ||||
Amateur | Reference | – | Reference | – |
Professional | 1.46 (1.01 to 2.10) | 0.04 | 1.37 (0.87 to 2.14) | 0.18 |
Matchmaker | ||||
Others | Reference | – | Reference | – |
Dominant matchmaker | 0.83 (0.57 to 1.22) | 0.35 | 0.86 (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.