Table 1
Variation in Chiropractic Supply and Utilization by Hospital Referral Region
| Mean (SD) | Minimum | Maximum | Extremal Ratio | Coefficient of Variation | |
|---|---|---|---|---|---|
| Population | |||||
| General Population | 991,483 (1,128,478) | 114,072 | 10,300,000 | 90,350 | 1.14 |
| Medicare Beneficiaries | 82,072 (75,268) | 13,680 | 456,285 | 33.4 | 0.92 |
| Supply | |||||
| Chiropractic Supplya | 21.5 (9.4) | 5.6 | 79.8 | 14.3 | 0.44 |
| Utilization | |||||
| Chiropractic Utilization Intensityb | 10.6 (1.8) | 6.7 | 16.8 | 2.5 | 0.17 |
| Chiropractic Use:c | |||||
| Among All Beneficiaries | 75.9 (39.1) | 14.5 | 254 | 17.5 | 0.51 |
| Among those with Low Back/Pelvis Diagnosis | 310 (126) | 77.3 | 752 | 9.7 | 0.41 |
| Among those with Cervical Spine Diagnosis | 463 (149) | 141 | 875 | 6.2 | 0.32 |
| Among those with Cranial Diagnosis | 192 (101) | 50.7 | 620 | 12.2 | 0.53 |
cChiropractic Users per 1,000 Beneficiaries
Data for “Cranial Problem” in 8 HRRs and for “Chiropractic Utilization Intensity” in 35 HRRs was suppressed, in accordance with CMS rules for privacy protection. Diagnostic categories overlap. Abbreviation: SD = Standard Deviation