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| Variables | True model, mean (95% CI) | Model without sofa, mean (95% CI) | Bias |
|---|---|---|---|
| Intercept | −0.85 (−1.63, −0.07) | −0.03 (−0.57, 0.52) | 0.96 |
| Percent | −0.97 (−1.48, −0.46) | −1.22 (−1.70, −0.75) | 0.26 |
| Age | 0.01 (0.00, 0.02) | 0.01 (0.00, 0.02) | 0 |
| Sofa | 0.07 (0.02, 0.12) | NA | NA |
