Research Article
Effectiveness of Different Pain Control Methods in Patients with Knee Osteoarthritis after Knee Arthroplasty
Table 3
GEE analysis of the variation in lowest pain rating in relation to group and time (
).
| | Parameters | Estimated value | Standard error | Wald chi-square | value |
| | Intercept | 1.199 | .3794 | 9.979 | .002 | | Group | | | | | | G2 versus G1 | −.281 | .2598 | 1.189 | .275 | | Time | | | | | | T1 versus T0 | 3.092 | .2492 | 153.962 | <.001 | | T2 versus T0 | 1.425 | .1840 | 60.003 | <.001 | | T3 versus T0 | .542 | .1810 | 8.955 | .003 | | T4 versus T0 | .258 | .1789 | 2.085 | .149 | | Group × time | | | | | | G2 T1 versus T0 | −.846 | .4100 | 4.257 | .039 | | versus G1 T1 versus T0 | | G2 T2 versus T0 | −.021 | .3542 | .004 | .952 | | versus G1 T2 versus T0 | | G2 T3 versus T0 | −.243 | .3160 | .593 | .441 | | versus G1 T3 versus T0 | | G2 T4 versus T0 | −.065 | .3023 | .047 | .829 | | versus G1 T4 versus T0 | | Gender | | | | | | Female versus male | .304 | .1370 | 4.927 | .026 | | Anesthetic method | | | | | | General versus spinal | .395 | .2239 | 3.117 | .077 | | POABS | −.011 | .0078 | 1.189 | .275 |
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Note: GEE = generalized estimating equations; ; ; ; G1: Group 1; G2: Group 2; T1: recovery room (day of surgery); T1: ward (day of surgery); T2: postoperative day 1; T3: postoperative day 2; T4: postoperative day 3; POABS = Pain and Opioids Analgesics Beliefs Scale.
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