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. Author manuscript; available in PMC: 2019 Jun 28.
Published in final edited form as: Am J Sports Med. 2018 May 2;46(7):1545–1550. doi: 10.1177/0363546518773757

TABLE 2.

Univariate Regression to Identify Factors Associated With Psychological Readiness (ACL-RSI Scores) Among All 635 Patientsa

Independent Variable β Coefficient (95% CI) P Value
Age −0.2 (−0.4 to −0.01) .04
Sex 5.8 (2 to 10) .002
Time between ACL injury and surgery −0.1 (−0.1 to −0.02) .006
Preinjury sport frequency 5.4 (2 to 9) .003
Limb symmetry index 0.5 (0.3 to 0.6) .001
Anterior−posterior laxity −0.6 (−1.4 to 0.2) .2
IKDC subjective form (symptoms/function) 1.3 (1.1 to 1.4) .001
a

For categorical outcomes, a positive β coefficient is associated with male sex and the “high” category of preinjury sports frequency (4–7 days/week). ACL, anterior cruciate ligament; ACL-RSI, Anterior Cruciate Ligament–Return to Sport After Injury; IKDC, International Knee Documentation Committee.