Volume 12, Number 11—November 2006
Research
Staphylococcus aureus–associated Skin and Soft Tissue Infections in Ambulatory Care
, L. Clifford McDonald†, Sanjay Mandal†, and Daniel B. Jernigan†
Table 3
Average annual number, percent distribution, and rate of ambulatory care visits for selected skin and soft tissue infections, by selected patient, provider, and visit characteristics, United States, 2001–2003*
| Characteristic | Visits, n in thousands | % Distribution | 95% CI | Visits/10,000 persons/y† | 95% CI | |
|---|---|---|---|---|---|---|
| All visits | 11,618 | 100.0 | NA | 410.7 | 368.7–452.7 | |
| Setting | ||||||
| Physician office | 8,370 | 72.0 | 68.8–75.1 | 295.9 | 255.9–335.9 | |
| Outpatient department | 986 | 8.5 | 7.1–10.2 | 34.9 | 29.1–40.6 | |
| Emergency department | 2,262 | 19.5 | 17.3–21.9 | 80.0 | 72.3–87.7 | |
| Patient age, y | ||||||
| <2 | 576 | 5.0 | 3.4–7.3 | 721.5 | 434.2–1008.9 | |
| 2–18 | 2,292 | 19.7 | 16.8–23.1 | 333.7 | 272.6–394.7 | |
| 19–44 | 3,921 | 33.7 | 30.2–37.5 | 369.6 | 315.8–423.5 | |
| 45–64 | 2,793 | 24.0 | 20.4–28.1 | 422.2 | 346.7–497.6 | |
| >65 | 2,036 | 17.5 | 13.7–22.1 | 599.2 | 431.9–766.6 | |
| Patient sex | ||||||
| Female | 6,403 | 55.1 | 51.5–58.7 | 442.0 | 388.2–495.7 | |
| Male | 5,216 | 44.9 | 41.3–48.5 | 377.9 | 329.1–426.7 | |
| Patient race | ||||||
| White | 9,427 | 81.1 | 77.2–84.6 | 412.1 | 365.6–458.5 | |
| Black or African American | 1,635 | 14.1 | 11.5–17.1 | 462.8 | 362.3–563.3 | |
| Other | 556 | 4.8 | 3.0–7.7 | 296.1 | 149.3–442.8 | |
| Provider region | ||||||
| Northeast | 2,323 | 20.0 | 16.1–24.5 | 435.3 | 333.9–536.8 | |
| Midwest | 2,046 | 17.6 | 14.5–21.2 | 319.3 | 255.7–382.8 | |
| South | 4,641 | 40.0 | 34.9–45.3 | 459.7 | 377.3–542.2‡ | |
| West | 2,608 | 22.5 | 18.7–26.7 | 404.4 | 325.0–483.9 | |
| Provider statistical area | ||||||
| Metropolitan | 9,775 | 84.1 | 79.3–88.0 | 425.4 | 374.9–476.0‡ | |
| Nonmetropolitan | 1,843 | 15.9 | 12.0–20.7 | 347.1 | 249. 1–445.1 | |
| Payment | ||||||
| Private insurance | 5,853 | 50.4 | 46.0–54.8 | 302.8 | 264.0–341.5 | |
| Medicare | 2,049 | 17.6 | 13.8–22.2 | 591.2 | 425.6–756.7 | |
| Medicaid or SCHIP | 1,889 | 16.3 | 13.4–19.7 | 675.3 | 530.9–819.7 | |
| Uninsured§ | 990 | 8.5 | 6.9–10.4 | 242.9 | 192.9–293.0 | |
| Other¶ | 837 | 7.2 | 5.6–9.3 | # | NA
*Numbers may not add to totals due to rounding. CI, confidence interval; NA, not applicable; SCHIP, State Children's Health Insurance Program. | |
*Numbers may not add to totals due to rounding. CI, confidence interval; NA, not applicable; SCHIP, State Children's Health Insurance Program.
†Visit rates for age, sex, race, and region are based on the average of US Census Bureau estimates of the civilian noninstitutional population of the United States, for July 1, 2001, July 1, 2002, and July 1, 2003; population estimates of metropolitan statistical area status are based on data from the 2001, 2002, and 2003 National Health Interview Survey, National Center for Health Statistics, adjusted to the US Census Bureau definition of core-based statistical areas; and denominator data for expected source of payment are based on the 2001, 2002, and 2003 National Health Interview Survey, National Center for Health Statistics.
‡95% CI for 1992–1994 and 2001–2003 overlap, but p<0.05.§Includes self-pay, charity, and no charge.
¶Includes Worker's Compensation, other payment, unknown, and blank.
#Denominator data not available.