Table 2 Secular trend of WOMAC function score in two studies with interaction between study and time
From: Comparing the functional impact of knee replacements in two cohorts
Annual WOMAC function change (95% CI)* | P value | ||
|---|---|---|---|
SxOA subjects | |||
Visit, year | −0.64 (−0.88, −0.39) | <.0001 | |
Study | MOST | 3.15 (2.14, 4.16) | <.0001 |
Study | OAI | 1.0 (referent) | |
Visit* study | MOST | −0.39 (−0.70, −0.08) | 0.01 |
Visit* study | OAI | 1.0 (referent) | |
SxOA subjects, excluding those with TKR | |||
Visit, year | −0.50 (−0.726 -0.23) | 0.0008 | |
Study | MOST | 3.24 (2.20, 4.29) | <.0001 |
Study | OAI | 1.0 (referent) | |
Visit* study | MOST | −0.08 (−0.41, 0.25) | 0.64 |
Visit* study | OAI | 1.0 (referent) | |