TABLE 1.
Characteristics of patients admitted for diverticulitis between 1993 and 2008 according to hospital volume quartile
| All hospitals (n=4,108,726) | Hospital volume | ||||
|---|---|---|---|---|---|
|
| |||||
| 1st quartile | 2nd quartile | 3rd quartile | 4th quartile | ||
| Age*, years | |||||
| <40 | 7.0 (6.9–7.1) | 6.8 (6.7–6.9) | 7.2 (7.1–7.3) | 7.1 (7.0–7.2) | 6.9 (6.8–7.0) |
| 40–59 | 38.6 (38.4–38.7) | 36.5 (36.3–36.7) | 39.0 (38.7–39.1) | 39.4 (39.2–39.6) | 39.4 (39.2–39.6) |
| ≥60 | 54.4 (54.3–54.5) | 56.7 (56.5–56.9) | 53.9 (53.7–54.1) | 53.4 (53.2–53.6) | 53.7 (53.5–53.9) |
| Sex* | |||||
| Male | 39.2 (39.1–39.3) | 38.0 (37.8–38.2) | 39.0 (38.8–39.2) | 39.6 (39.4–39.8) | 40.2 (39.9–40.4) |
| Female | 60.8 (60.7–60.9) | 62.0 (61.8–62.2) | 61.0 (60.8–61.2) | 60.4 (60.2–60.6) | 59.8 (59.6–60.1) |
| Race/ethnicity* | |||||
| Non-Hispanic white | 63.8 (63.7–64.0) | 58.5 (58.2–58.7) | 59.5 (59.3–59.7) | 65.3 (65.1–65.5) | 72.2 (72.0–72.4) |
| Black | 5.4 (5.4–5.5) | 5.0 (4.9–5.1) | 5.7 (5.6–5.8) | 5.0 (4.9–5.1) | 6.0 (5.9–6.1) |
| Hispanic | 5.4 (5.3–5.4) | 5.2 (5.1–5.3) | 5.4 (5.3–5.5) | 4.2 (4.1–4.3) | 6.7 (6.6–6.8) |
| Unavailable | 25.4 (25.3–25.5) | 31.4 (31.1–31.6) | 29.4 (29.2–29.6) | 25.5 (25.3–25.6) | 15.1 (14.9–15.2) |
| Comorbidity score*, mean | 1.78 (1.77–1.78) | 1.77 (1.77–1.78) | 1.80 (1.79–1.80) | 1.77 (1.76–1.78) | 1.77 (1.77–1.78) |
| Health insurance* | |||||
| Private | 36.5 (36.4–36.6) | 31.5 (31.3–31.7) | 36.3 (36.1–36.6) | 38.8 (38.6–39.0) | 39.4 (39.2–39.63) |
| Medicare | 53.7 (53.6–53.8) | 56.5 (56.3–56.8) | 53.3 (53.1–53.5) | 52.3 (52.0–52.5) | 52.7 (52.5–53.0) |
| Medicaid | 4.1 (4.1–4.2) | 5.5 (5.4–5.6) | 4.3 (4.2–4.3) | 3.7 (3.7–3.8) | 3.0 (2.9–3.1) |
| Self-pay | 3.3 (3.3–3.4) | 3.9 (3.9–4.0) | 3.4 (3.3–3.5) | 3.2 (3.2–3.3) | 2.7 (2.7–2.8) |
| Other | 2.3 (2.3–2.4) | 2.6 (2.5–2.7) | 2.7 (2.6–2.7) | 2.0 (1.9–2.0) | 2.1 (2.1–2.2) |
| Admission type* | |||||
| Elective | 20.5 (20.5–20.7) | 21.5 (21.3–21.7) | 20.8 (20.7–21.0) | 20.1 (19.9–20.2) | 19.9 (19.7–20.1) |
| Urgent | 24.1 (24.0–24.2) | 30.2 (30.0–30.4) | 25.2 (25.0–25.4) | 21.6 (21.4–21.8) | 19.6 (19.5–19.9) |
| Emergent | 55.3 (55.2–55.4) | 48.3 (48.1–48.6) | 54.0 (53.7–54.2) | 58.4 (58.1–58.6) | 60.4 (30.2–60.6) |
| Hinchey classification* | |||||
| 0 | 90.3 (90.3–90.4) | 91.8 (91.6–91.9) | 90.5 (90.4–90.6) | 89.9 (89.7–90.0) | 89.2 (89.1–89.4) |
| I or II | 8.1 (8.0–8.1) | 6.7 (6.6–6.8) | 7.8 (7.7–7.9) | 8.5 (8.4–8.6) | 9.2 (9.1–9.3) |
| III or IV | 1.6 (1.6–1.6) | 1.5 (1.5–1.6) | 1.7 (1.6–1.7) | 1.6 (1.6–1.7) | 1.6 (1.5–1.6) |
| Surgical treatment* | |||||
| Partial or total colectomy | 20.8 (20.7–20.9) | 17.4 (17.3–17.6) | 20.8 (20.7–21.0) | 22.1 (21.9–22.3) | 23.0 (22.8–23.2) |
Data presented as % (95% CI) unless otherwise indicated.
*
P<0.0001