Table 1.
Characteristics of Visits with a Diagnosis of Hypertension (1999 to 2000 Estimates)
| Characteristic | n (Millions) | 95% CI (Millions) | Percent of Sample |
|---|---|---|---|
| Total survey | 137.4 | ||
| NAMCS | 124.2 | (84.8 to 164.0) | 90.4 |
| NHAMCS | 13.1 | (8.3 to 18.0) | 9.5 |
| Age, y | |||
| 18 to 44 | 15.4 | (10.7 to 20.2) | 11.2 |
| 45 to 64 | 53.1 | (38.5 to 67.6) | 38.6 |
| 65 to 74 | 35 | (24.2 to 45.8) | 25.5 |
| >74 | 33.9 | (22.4 to 45.4) | 24.7 |
| Gender | |||
| Female | 80.2 | (56.8 to 104.0) | 58.3 |
| Male | 57.2 | (40.4 to 74.0) | 41.6 |
| Race | |||
| White | 95.2 | (70.1 to 120.0) | 69.3 |
| Black | 23.4 | (15.1 to 31.6) | 17.0 |
| Asian | 7.6 | (1.2 to 14.1) | 5.5 |
| Hispanic | 11.2 | (3.7 to 18.7) | 8.2 |
| Payment source | |||
| Private insurance | 57.5 | (41.0 to 74.0) | 41.8 |
| Medicare | 55.4 | (40.2 to 70.6) | 40.3 |
| Medicaid | 9 | (5.4 to 12.7) | 6.6 |
| Self-pay | 4.7 | (2.7 to 6.6) | 3.4 |
| Other | 10.7 | (5.6 to 15.9) | 7.8 |
| Geographic region | |||
| Northeast | 31.4 | (26.2 to 60.2) | 22.9 |
| Midwest | 33.6 | (15.5 to 51.7) | 24.5 |
| South | 44.1 | (26.4 to 61.9) | 32.1 |
| West | 28.2 | (12.4 to 38.4) | 20.5 |
| Type of visit | |||
| Acute | 27.4 | (18.2 to 36.7) | 19.9 |
| Chronic routine | 73.5 | (52.3 to 94.6) | 53.5 |
| Chronic flare | 10.4 | (6.9 to 13.8) | 7.6 |
| Nonillness care | 26.1 | (17.4 to 34.9) | 19.0 |
| Physician specialty* | |||
| Internal medicine | 44.5 | (32.4 to 56.6) | 32.4 |
| Family medicine | 55.2 | (33.6 to 76.7) | 40.2 |
| Cardiology | 8.4 | (4.2 to 12.6) | 6.1 |
| Other | 16.2 | (8.1 to 24.2) | 11.8 |
| Cardiovascular comorbidities | |||
| Coronary artery disease† | 10.4 | (6.0 to 14.9) | 7.6 |
| Diabetes mellitus‡ | 24.1 | (16.5 to 31.7) | 17.5 |
| Obesity§ | 5.8 | (1.2 to 3.6) | 4.2 |
| Dyslipidemia|| | 10.4 | (8.1 to 14.4) | 7.6 |
| Other (CVA, CHF)¶ | 3.8 | (0.6 to2.6) | 2.8 |
| Number of comorbidities | |||
| None | 89.6 | (63.2 to 116.0) | 65.2 |
| One | 40.9 | (28.4 to 53.5) | 29.8 |
| Two | 6.9 | (4.7 to 9.0) | 5.0 |
| Number of antihypertensives | |||
| None | 42.8 | (29.1 to 56.4) | 31.1 |
| 1 to 2 | 78.7 | (56.2 to 101.0) | 57.3 |
| 3 or more | 15.9 | (11.1 to 20.8) | 11.6 |
*
Data for NAMCS only.
†
ICD 9 codes: 411.1, 411.81, 411.89, 412, 413.0, 413.1, 413.9, 414.00 to 414.05.
‡
ICD 9 codes: 401.0, 401.1, 401.9.
§
ICD 9 code: 278.00.
||
ICD 9 codes: 272.1 to 272.9.
¶
ICD 9 codes: 434.0, 434.1, 436, and 428.0, 428.1, 428.9 402.01, 402.11, 402.91.
NAMCS, National Ambulatory Medical Care Survey; NAHMCS, National Hospital Ambulatory Medical Care Survey; CVA, stroke; CHF, congestive heart failure; CI, confidence interval.