Appendix Table 4.
Logistic Regression of Variables Associated With Achieving PASS at 6 Months and 1 Year
| Questionnaire | Factor | 6 Months |
12 Months |
||||
|---|---|---|---|---|---|---|---|
| Univariate | Multivariate | Or (95% CI) | Univariate | Multivariate | Or (95% CI) | ||
| IKDC | Sex | .028 | .073 | 2.950 (.905– 9.623) | .884 | 1.098 (.313– 3.847) | |
| Age | .004 | .348 | .963 (.891– 1.041) | .014 | .983 | .999 (.899– 1.110) | |
| BMI | .004 | .262 | .952 (.874– 1.037) | .001 | .020 | .885 (.799– .981) | |
| WC | .609 | .643 (.118– 3.496) | .078 | .585 | .530 (.055– 5.150) | ||
| Age at first instability event | .012 | .846 | .992 (.916– 1.074) | .013 | .849 | .990 (.889– 1.102) | |
| Number of instability events | .439 | .990 (.965– 1.016) | .637 | 1.017 (.948– 1.090) | |||
| Preoperative PRO score | .002 | .082 | 1.028 (.996– 1.060) | .033 | .344 | 1.022 (.977– 1.070) | |
| KOOS Symptoms | Sex | .093 | .432 | 1.587 (.502– 5.020) | .117 | 2.825 (.770– 10.360) | |
| Age | .054 | .016 | .900 (.825– 0.980) | .936 | .997 (.938– 1.060) | ||
| BMI | .015 | .854 | .990 (.892– 1.099) | .175 | .948 (.877– 1.024) | ||
| WC | .694 | 1.543 (.178– 13.363) | .865 | .828 (.093– 7.325) | |||
| Age at first instability Event | .114 | .962 (.917– 1.009) | .793 | 1.009 (.943– 1.080) | |||
| Number of instability events | .190 | 1.070 (.967– 1.185) | .872 | .997 (.963 – 1.032) | |||
| Preoperative PRO score | .078 | .419 | 1.013 (.982– 1.044) | .238 | 1.018 (.988– 1.049) | ||
| KOOS Pain | Sex | .073 | .166 | 8.470 (.412– 174.335) | .059 | 7.385 (.930– 58.606) | |
| Age | .002 | .022 | .823 (.696– .973) | .367 | .972 (.914– 1.034) | ||
| BMI | .003 | .778 | 1.024 (.869– 1.206) | .597 | .976 (.891– 1.069) | ||
| WC | .590 | .545 (.061– 4.948) | .649 | .600 (.067– 5.407) | |||
| Age at first instability event | .009 | .493 | .950 (.821– 1.100 | .936 | .997 (.929– 1.070) | ||
| Number of instability events | .450 | 1.047 (.930– 1.178) | .796 | .995 (.959– 1.032) | |||
| Preoperative PRO score | .004 | .059 | 1.060 (.998– 1.127) | .368 | 1.015 (.983– 1.048) | ||
| KOOS ADL | Sex | .068 | .424 | 1.923 (.388– 9.536) | .033 | 3.424 (1.102 –10.634) | |
| Age | .020 | .040 | .878 (.776– .994) | .918 | .997 (.947 –1.051) | ||
| BMI | .013 | .605 | 1.035 (.908–1.179) | .822 | .992 (.922–1.066) | ||
| WC | .961 | .947 (.108–8.335) | .461 | .527 (.096–2.889) | |||
| Age at first instability event | .040 | .593 | .970 (.869–1.084) | .764 | 1.009 (.953–1.068) | ||
| Number of instability events | .324 | 1.056 (.948–1.176) | .841 | 1.003 (.970–1.038) | |||
| Preoperative PRO score | .005 | .074 | 1.035 (.997 – 1.074) | .156 | 1.018 (.993– 1.048) | ||
| KOOS Sport | Sex | .176 | 2.938 (.617– 11.983 | .719 | 1.293 (.319– 5.242) | ||
| Age | .019 | .399 | .941 (.817 – 1.084) | .449 | .973 (.908 – 1.043) | ||
| BMI | .003 | .644 | .969 (.848 – 1.108) | .036 | .221 | .937 (.844 – 1.040) | |
| WC | .590 | .545 (.060 – 4.948) | .468 | .439 (.048 – 4.053) | |||
| Age at first instability event | .025 | .634 | .970 (.855– 1.100) | .986 | 1.001 (.922– 1.086) | ||
| Number of instability events | .411 | 1.060 (.922– 1.219) | .585 | .990 (.955– 1.026) | |||
| Preoperative PRO score | .005 | .053 | 1.047 (.999– 1.096) | .062 | .164 | 1.026 (.989– 1.064) | |
| KOOS QOL | Sex | .341 | 1.917 (.502-7.321) | .307 | 2.293 (.467– 11.248) | ||
| Age | .105 | 0.953 (.898 – 1.010) | .372 | .969 (.905– 1.038) | |||
| BMI | .052 | .209 | .942 (.858– 1.034) | .630 | .975 (.881– 1.080) | ||
| WC | .649 | .600 (.067– 5.407) | .468 | .439 (.04 – 4.053) | |||
| Age at first instability event | .207 | 0.962 (.907– 1.021) | .943 | 1.003 (.923– 1.090) | |||
| Number of instability events | .433 | 1.05 (.934– 1.171) | .601 | .990 (.955– 1.027) | |||
| Preoperative PRO score | .027 | .045 | 1.053 (1.001 –1.108) | .098 | 1.043 (.992 – 1.098) | ||
| KOOS JR | Sex | .179 | 1.761 (.771–4.022) | .134 | 3.272 (.695–15.406) | ||
| Age | .010 | .065 | .926 (0.853–1.005) | .102 | .952 (.898–1.001) | ||
| BMI | .019 | .955 | 1.002 (.923– 1.089) | .292 | .954 (.875– 1.041) | ||
| WC | .354 | .481 (.102– 2.258) | .649 | .600 (.067– 5.407) | |||
| Age at first instability event | .024 | .862 | .993 (.918– 1.075) | .854 | .993 (.927– 1.065) | ||
| Number of Instability Events | .927 | .999 (.973– 1.026) | .542 | .990 (.958–1.023) | |||
| Preoperative PRO Score | .006 | .059 | 1.032 (.999– 1.067) | .122 | 1.036 (.991 – 1.082) | ||
| Kujala | Sex | .085 | .022 | 6.624 (1.307 –33.573) | .102 | 3.615 (.775– 16.866) | |
| Age | .141 | .964 (.919– 1.012) | .249 | .966 (.911– 1.024) | |||
| BMI | .018 | .330 | .955 (.871– 1.047) | .049 | .209 | .946 (.867– 1.032) | |
| WC | .461 | .528 (.096– 2.889) | .706 | .655 (.073– 5.875) | |||
| Age at first instability event | .039 | .539 | .974 (.896– 1.059) | .624 | .984 (.923– 1.049) | ||
| Number of instability events | .771 | .996 (.968– 1.025) | .702 | .993 (.961– 1.027) | |||
| Preoperative PRO score | .004 | .096 | 1.032 (.994– 1.070) | .017 | .059 | 1.035 (.999– 1.072) | |
Bold indicates significant value (P < .05 and/or does not cross 1.0). All univariate and multivariate analyses reported as P values. Odds Ratio is reported for multivariate regression if significant, otherwise corresponds to univariate regression. OR, odds ratio; 95% CI, 95% confidence interval; PASS, patient acceptable symptomatic state; IKDC, International Knee Documentation Committee; KOOS, Knee Injury and Osteoarthritis Outcome Score; ADL, activities of daily living; QOL, quality of life; JR, joint replacement; BMI, body mass index; WC, workers’ compensation; PRO, patient-reported outcome.