Demographic and relevant clinical features comparing patients with type 1 and type 2 diabetes
| Characteristic | Group; % of patients (95% CI)*† | ||
|---|---|---|---|
| Type 2 diabetes n = 1199 | Type 1 diabetes n = 110 | Total n = 1309 | |
| Sex, male | 53.5 (50.6–56.3) | 47.3 (37.7–57.0) | 52.9 (50.2–55.7) |
| Age, yr, mean (95% CI) | 64.6 (63.9–65.3) | 46.0 (42.8–49.2) | 63.0 (62.3–63.8) |
| No. of encounters in past year, mean (95% CI) | 5.1 (4.8–5.3) | 4.0 (3.2–4.8) | 5.0 (4.8–5.2) |
| Prescription for insulin (A10AB - -)‡ | |||
| In past year | 6.6 (5.3–8.2) | 30.0 (21.8–39.6) | 8.6 (7.1–10.2) |
| In past 2 years | 8.8 (7.2–10.5) | 47.3 (37.8–57.0) | 12.0 (10.3–13.9) |
| At any time | 13.0 (11.2–15.1) | 76.4 (67.1–83.7) | 18.3 (16.3–20.6) |
| Prescription for blood glucose–lowering drugs excluding insulin (A10B - - - )‡ | |||
| In past year | 45.5 (42.6–48.3) | 12.7 (7.4–20.8) | 42.7 (40.0–45.4) |
| In past 2 years | 54.6 (51.8–57.5) | 20.9 (14.0–29.9) | 51.8 (49.0–54.5) |
| At any time | 71.9 (69.2–74.4) | 26.4 (18.6–35.8) | 68.1 (65.5–70.6) |
| Occurrence of “type 1” in any text field | 0.7 (0.3–1.4) | 40.0 (30.9–49.8) | 4.0 (3.0–5.2) |
| Billing code 250.01 in past year | 0 | 10.0 (5.3–17.6) | 0.8 (0.4–1.5) |
| Occurrence of “type 2” in any text field | 26.3 (23.8–28.9) | 7.3 (3.4–14.3) | 24.7 (22.4–27.1) |
| Occurrence of “diabetes” in any text field | 95.3 (93.9–96.4) | 99.1 (94.3–100) | 95.6 (94.4–96.7) |
Note: CI = confidence interval.
↵* Except where indicated otherwise.
↵† CIs for proportions are exact.
↵‡ The parenthetical notation represents relevant codes in the Anatomical Therapeutic Chemical Classification system, where each code is 7 characters long and dashes represent “wild card” characters. Specifically, insulin is represented by various codes in which the first 5 characters are A10AB, and blood glucose–lowering drugs other than insulin are represented by various codes in which the first 4 characters are A10B.