Research Article
Effectiveness of Different Pain Control Methods in Patients with Knee Osteoarthritis after Knee Arthroplasty
Table 7
GEE analysis of variation in the optimal knee flexion angle in relation to time and group (
).
| | Parameters | Estimated value | Standard error | Wald chi-square | value |
| | Intercept | 76.118 | 18.5774 | 16.788 | <.001 | | Group | | | | | | G2 versus G1 | −4.515 | 3.4833 | 1.680 | .195 | | Time | | | | | | T1 versus T0 | 11.600 | 1.5123 | 58.832 | <.001 | | T2 versus T0 | 18.307 | 1.8896 | 93.862 | <.001 | | Group × time | | | | | | G2 T1 versus T0 | −1.696 | 2.8677 | .350 | .554 | | versus G1 T1 versus T0 | | G2 T2 versus T0 | .492 | 2.9783 | .027 | .869 | | versus G1 T2 versus T0 | | Gender | | | | | | Female versus male | −4.356 | 2.4610 | 3.132 | .077 | | Analgesic intake | | | | | | Yes versus no | −1.641 | 2.3051 | .507 | .477 | | Age | .192 | .1571 | 1.502 | .220 | | BMI | −.550 | .2948 | 3.481 | .062 | | Preoperative knee angle | .099 | .0659 | 2.271 | .132 | | Highest painful rating | −1.331 | .4637 | 8.241 | .004 |
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Note: GEE = generalized estimating equations; ; ; G1: Group 1; G2: Group; T0: postoperative day 1; T1: postoperative day 2; T2: postoperative day 3.
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