Table 4 Results of the mixed-effects model for parathyroid hormone (PTH) levels. CI: confidence interval; SE: standard error; intercept: baseline PTH level when all predictors are at their reference levels; time [T.Post-Op week 1]: effect of postoperative week 1 on PTH levels; time [T.Pre-Op]: effect of preoperative time on PTH levels; Group: effect of group on PTH levels; Group [T.Post-Op week 1]: interaction effect of group and postoperative week 1 on PTH levels; T.Pre-Op: effect of the preoperative period on PTH levels; Group Var: variance attributed to the grouping factor.
Parameter | Coefficient | 95% CI | SE | Z value | P value |
|---|---|---|---|---|---|
Intercept | 27.134 | 11.756–42.512 | 7.846 | 3.458 | 0.001 |
Time [T.Post-Op Week 1] | 2.589 | 0.543–4.635 | 1.044 | 2.481 | 0.013 |
Time [T.Pre-Op] | 14.250 | 12.204–16.296 | 1.044 | 13.652 | < 0.001 |
Group | 6.455 | –15.295–28.205 | 11.097 | 0.582 | 0.561 |
Group: Time [T.Post-Op Week 1] | 0.457 | –2.469–3.384 | 1.493 | 0.306 | 0.759 |
Group: Time [T.Pre-Op] | –5.633 | –8.560 to – 2.706 | 1.493 | –3.772 | < 0.001 |
Group Var | 61.014 |
