Table 2.
Demographic characteristics of the evaluated cohorts
| Variable | Value
|
P | |
|---|---|---|---|
| FM (n=4,296) |
No-FM (n=583,665) |
||
| Female, n (%) | 3,379 (78.7) | 376,653 (64.5) | <0.0001 |
| Age, years, mean (SD) | 53.3 (14.6) | 52.7 (16.3) | 0.0318 |
| Age distribution, n (%) | <0.0001 | ||
| 18–49 years | 1,651 (38.4) | 229,910 (39.4) | |
| 50–64 years | 1,482 (34.5) | 183,414 (31.4) | |
| ≥65 years | 1,163 (27.1) | 170,341 (29.2) | |
| Race, n (%) | <0.0001 | ||
| African American | 296 (6.9) | 83,727 (14.3) | |
| Asian | 32 (0.7) | 11,294 (1.9) | |
| Caucasian | 3,778 (87.9) | 429,955 (73.7) | |
| Other/unknown | 190 (4.4) | 58,689 (10.1) | |
| Region, n (%) | |||
| Midwest | 2,540 (59.1) | 375,872 (64.4) | <0.0001 |
| Northeast | 373 (8.7) | 118,146 (20.2) | |
| South | 1,125 (26.2) | 75,414 (12.9) | |
| West | 5 (0.1) | 458 (0.1) | |
| Other/unknown | 253 (5.9) | 13,775 (2.4) | |
| Insurance type, n (%) | <0.0001 | ||
| Commercial | 181 (4.2) | 145,425 (24.9) | |
| Medicaid | 7 (0.2) | 3,740 (0.6) | |
| Medicare | 88 (2.0) | 61,151 (10.5) | |
| Missing/unknown | 4,017 (93.5) | 370,332 (63.4) | |
| Other payer type | 0 (0.0) | 297 (0.1) | |
| Uninsured | 3 (0.1) | 2,720 (0.5) | |
| Charlson Comorbidity Index, mean (SD) | 0.8 (1.3) | 0.5 (1.1) | <0.0001 |
Abbreviations: FM, fibromyalgia; SD, standard deviation.