Table 1.
Baseline demographic characteristics by residence in states subject to parity laws and those not subject to them.
| Total |
Non-Parity States |
Parity States |
||||
|---|---|---|---|---|---|---|
| Patient Characteristics | No.a | No.a | (%) | No.a | (%) | Pb |
| Total | 7778 | 6172 | (100.0) | 1606 | (100.0) | |
| Oral endocrine therapy | 0.096 | |||||
| Anastrozole | 2392 | 1930 | (31.3) | 462 | (28.8) | |
| Exemestane | 805 | 651 | (10.5) | 154 | (9.6) | |
| Letrozole | 1454 | 1142 | (18.5) | 312 | (19.4) | |
| Tamoxifen | 3127 | 2449 | (39.7) | 678 | (42.2) | |
| Year of index claim | <0.001 | |||||
| 2007–2008 | 1782 | 1748 | (28.3) | 34 | (2.1) | |
| 2009–2010 | 1836 | 1415 | (22.9) | 421 | (26.2) | |
| 2011–2012 | 2312 | 1558 | (25.2) | 754 | (46.9) | |
| 2013–2015 | 1848 | 1451 | (23.5) | 397 | (24.7) | |
| Age, years | 0.335 | |||||
| 18–44 | 1017 | 806 | (13.1) | 211 | (13.1) | |
| 45–54 | 3266 | 2562 | (41.5) | 704 | (43.8) | |
| 55–59 | 1842 | 1474 | (23.9) | 368 | (22.9) | |
| 60–64 | 1653 | 1330 | (21.5) | 323 | (20.1) | |
| Charlson-Deyo comorbidity score |
0.366 | |||||
| 0 | 7096 | 5641 | (91.4) | 1455 | (90.6) | |
| 1 | 573 | 450 | (7.3) | 123 | (7.7) | |
| 2 or higher | 109 | 81 | (1.3) | 28 | (1.7) | |
| Diagnosis | 0.853 | |||||
| Invasive cancer | 6950 | 5517 | (89.4) | 1433 | (89.2) | |
| Carcinoma in-situ | 828 | 655 | (10.6) | 173 | (10.8) | |
| Geographic region | <0.001 | |||||
| Northeast | 349 | 179 | (2.9) | 170 | (10.6) | |
| Midwest | 2614 | 2158 | (35.0) | 456 | (28.4) | |
| South | 2215 | 1464 | (23.7) | 751 | (46.8) | |
| West | 2600 | 2371 | (38.4) | 229 | (14.3) | |
| Insurance plan type | <0.001 | |||||
| HMO | 2269 | 1864 | (30.2) | 405 | (25.2) | |
| POS | 5121 | 4060 | (65.8) | 1061 | (66.1) | |
| Otherc | 388 | 248 | (4.0) | 140 | (8.7) | |
a
Number of unique drug therapy courses, defined as single drug type per patient. Patients may have had multiple (up to 4) drug therapy courses.
b
Pearson’s chi-squared p value
c
Includes preferred provider organization, exclusive provider organization, and indemnity plans
Abbreviations: HMO (health maintenance organization); POS (point of service)