Table 4. Generalized Linear Regression Analysis of 1-Year Overall Costs.
| Variable | Estimate (95% CI) | Mean Incremental Difference (2018 USD), $ |
|---|---|---|
| Intercept | 10.0084 (9.9275 to 10.0892) | 25 147 |
| Age 40-64 y | 0.1165 (0.1037 to 0.1293) | 2894 |
| Goiter | 0.0620 (0.0186 to 0.1065) | 1590 |
| Thyroiditis | 0.0834 (0.0375 to 0.1294) | 2193 |
| Cancer | 0.1303 (0.0858 to 0.1748) | 3314 |
| Female sex | −0.0999 (−0.1168 to −0.0830) | −2541 |
| Comorbidity score | ||
| 1 | 0.2153 (0.1906 to 0.2400) | 6030 |
| ≥2 | 0.7455 (0.6686 to 0.8223) | 27 936 |
| Region | ||
| North central | 0.1280 (0.1076 to 0.1484) | 3379 |
| South | −0.0312 (−0.0498 to −0.0125) | −790 |
| West | 0.0400 (0.0182 to 0.0619) | 1032 |
| Payer | ||
| HMO | −0.1219 (−0.1793 to −0.0644) | −2968 |
| POS | −0.1085 (−0.1680 to −0.0491) | −2637 |
| PPO | −0.1003 (−0.1556 to −0.0450) | −2577 |
| Other | −0.0959 (−0.1554 to −0.0363) | −2340 |
| Median income quintile | ||
| High | 0.0762 (0.0512 to 0.1013) | 1988 |
| Very high | 0.1075 (0.0829 to 0.1320) | 2831 |
| Medium MSA volume | −0.0195 (−0.0362 to −0.0028) | −494 |
| High MSA volume | −0.06557 (−0.0860 to −0.0454) | −1647 |
| Central neck dissection | 0.0792 (0.0618 to 0.0965) | 2068 |
| Lateral neck dissection | 0.3484 (0.3270 to 0.3698) | 10 342 |
| RLN injury | 0.4230 (0.3803 to 0.4657) | 13 286 |
| Parathyroid reimplantation | 0.0464 (0.0288 to 0.0640) | 1203 |
| Radiotherapy | 0.4628 (0.4353 to 0.4904) | 14 522 |
| Iodine therapy | 0.2648 (0.2480 to 0.2816) | 7137 |
| Magnesium disorder | 0.4481 (0.3493 to 0.5470) | 14 314 |
| Vitamin D deficiency | 0.0993 (0.0754 to 0.1233) | 2641 |
| Menopause | 0.1239 (0.0877 to 0.1600) | 3343 |
| Hypocalcemia | 0.1267 (0.1068 to 0.1465) | 3392 |
Abbreviations: HMO, health maintenance organization; MSA, metropolitan statistical area; POS, point of service; PPO, preferred provider organization; RLN, recurrent laryngeal nerve; USD, US dollars.