Table 7.
Estimation results of the quantile regression for the absolute value of the difference between Demirjian and Willems’ estimated age and chronological age
| Demirjian | Willems | ||
|---|---|---|---|
| Quantile | Variable | Coef. (CI 95%) | Coef. (CI 95%) |
| tau = 0.25 | Gender (male) | − 0.065 (− 0.211; 0.059) | 0.026 (− 0.162; 0.120) |
| Rheumatoid arthritis (yes) | − 0.212* (− 0.404; − 0.115) | − 0.067 (− 0.202; 0.066) | |
| Age | 0.057* (0.034; 0.094) | 0.041* (0.009; 0.067) | |
| tau = 0.50 | Gender (male) | − 0.031 (− 0.241; 0.212) | − 0.069 (− 0.288; 0.054) |
| Rheumatoid arthritis (yes) | − 0.254* (− 0.553; − 0.104) | − 0.336* (− 0.487; − 0.117) | |
| Age | 0.121* (0.090; 0.182) | 0.110* (0.065; 0.155) | |
| tau = 0.75 | Gender (male) | 0.015 (− 0.182; 0.347) | 0.051 (− 0.366; 0.326) |
| Rheumatoid arthritis (yes) | − 0.523* (− 0.805; − 0.118) | − 0.604* (− 0.891; − 0.167) | |
| Age | 0.188* (0.130; 0.231) | 0.201* (0.117; 0.230) | |
*states a statistically significant effect