Table 5.
Change in willingness to consider TKR surgery over two years
| N | Unadjusted Model | Adjusted Model* | |||
|---|---|---|---|---|---|
| Estimated change† over time (95% CI) | P-value | Estimated change† over time (95% CI) | P-value | ||
| Race | |||||
| African-American | 281 | −0.39 (−0.53, −0.24) | −0.41 (−0.56, −0.25) | ||
| White | 455 | −0.43 (−0.54, −0.32) | −0.43 (−0.55, −0.31) | ||
| Interaction (time*race) | 0.643 | 0.797 | |||
| Sex | |||||
| Male | 262 | −0.45 (−0.60, −0.29) | −0.45 (−0.61, −0.28) | ||
| Female | 474 | −0.40 (−0.51, −0.29) | −0.41 (−0.53, −0.29) | ||
| Interaction (time*sex) | 0.613 | 0.702 | |||
| Marital Status | |||||
| Single | 455 | −0.43 (−0.54, −0.31) | −0.42 (−0.54, −0.30) | ||
| Married | 281 | −0.40 (−0.54, −0.26) | −0.43 (−0.58, −0.28) | ||
| Interaction (time*marital status) | 0.714 | 0.918 | |||
| MOS-Social Support | |||||
| ≤ median | 388 | −0.38 (−0.51, −0.26) | −0.39 (−0.53, −0.26) | ||
| > median | 348 | −0.45 (−0.57, −0.32) | −0.45 (−0.58, −0.32) | ||
| Interaction (time*social support) | 0.466 | 0.565 | |||
| Δ WOMAC-pain | |||||
| ≤ median | 334 | −0.37 (−0.50, −0.25) | −0.43 (−0.56, −0.30) | ||
| > median | 288 | −0.44 (−0.57, −0.30) | −0.42 (−0.56, −0.28) | ||
| Interaction (time*Δ pain) | 0.481 | 0.908 | |||
| Δ WOMAC-disability | |||||
| ≤ median | 319 | −0.47 (−0.60, −0.35) | −0.51 (−0.64, −0.37) | ||
| > median | 303 | −0.33 (−0.46, −0.20) | −0.34 (−0.47, −0.20) | ||
| Interaction (time*Δ disability) | 0.124 | 0.076 | |||
| Seen by orthopedic surgeon | |||||
| No | 413 | −0.50 (−0.61, −0.38) | −0.51 (−0.63, −0.38) | ||
| Yes | 283 | −0.30 (−0.44, −0.16) | −0.32 (−0.46, −0.17) | ||
| Interaction (time*ortho surgeon) | 0.034 | 0.051 | |||
*
Adjusted for age, sex, race, education level, recruitment site, income, health insurance, MOS-Social Support, Δ WOMAC pain score and Δ WOMAC difficulty score
†
Change on Likert scale measure
MOS=Medical Outcomes Study; WOMAC=Western Ontario McMaster Instrument