| Term ↑ | Term Count | Mean Age | Cox Coef | Pearson (r) |
|---|---|---|---|---|
| cross section | 57 | 53.0315 | 0.0102588837195706 | -0.0650001660653588 |
| currently | 54 | 60.8844 | -0.139877133635978 | -0.0013252140091036 |
| degeneration | 918 | 61.6430 | -0.153086390306909 | 0.0219637546717197 |
| degenerative | 305 | 61.3917 | -0.0406156429206701 | 0.0065860508528443 |
| demonstrated | 151 | 61.8148 | 0.0936318777363159 | 0.0101871457153751 |
| deposition | 55 | 55.7959 | 0.0505389687332669 | -0.0418329351226803 |
| deposits | 51 | 55.9033 | 0.0569217913782231 | -0.0394383821147624 |
| descaling | 90 | 60.9333 | 0.0299238548881707 | -0.0012185328214533 |
| difficult | 185 | 60.3320 | -0.0285142534480672 | -0.0107076919930914 |
| difficult | 194 | 62.1083 | 0.0174189229061462 | 0.0160890627335508 |