Table 1 Identifying major IHD or cerebrovascular hospitalizations
From: Identification of major cardiovascular events in patients with diabetes using primary care data
GP codesa/drug (at least 1 prescription) | TP | FP | TN | FN | Sens (95 % CI) | Spec (95 % CI) | PPV (95 % CI) | NPV (95 % CI) |
|---|---|---|---|---|---|---|---|---|
IHD/cerebrovascular hospitalizations | ||||||||
GP codes | 312 | 567 | 15934 | 417 | 43 (39–46) | 97 (96–97) | 35 (32–39) | 97 (97–98) |
GP codes/nitrates | 498 | 1602 | 14899 | 231 | 68 (65–72) | 90 (90–91) | 24 (22–26) | 98 (98–99) |
GP codes/nitrates/platelet aggregation inhibitors | 672 | 5123 | 11378 | 57 | 92 (90–94) | 69 (68–70) | 12 (11–12) | 100 (99–100) |
GP codes/nitrates/platelet aggregation inhibitors/vitamin k antagonists | 685 | 6297 | 10204 | 44 | 94 (92–96) | 62 (61–63) | 10 (9–11) | 100 (99–100) |
IHD hospitalizations | ||||||||
GP codes | 212 | 431 | 16240 | 347 | 38 (34–42) | 97 (97–98) | 33 (29–37) | 98 (98–98) |
GP codes/nitrates | 391 | 1499 | 15172 | 168 | 70 (66–74) | 91 (91–91) | 21 (19–23) | 99 (99–99) |
GP codes/nitrates/platelet aggregation inhibitors | 520 | 5217 | 11454 | 39 | 93 (91–95) | 69 (68–69) | 9 (8–10) | 100 (100–100) |
GP codes/nitrates/platelet aggregation inhibitors/vitamin k antagonists | 529 | 6421 | 10250 | 30 | 95 (92–96) | 61 (61–62) | 8 (7–8) | 100 (100–100) |
Cerebrovascular hospitalizations | ||||||||
GP codes | 105 | 172 | 16874 | 79 | 57 (50–64) | 99 (99–99) | 38 (32–44) | 100 (99–100) |
GP codes/platelet aggregation inhibitors | 161 | 5162 | 11884 | 23 | 88 (82–92) | 70 (69–70) | 3 (3–4) | 100 (100–100) |
GP codes/platelet aggregation inhibitors/vitamin k antagonists | 168 | 6603 | 10443 | 16 | 91 (86–95) | 61 (61–62) | 2 (2–3) | 100 (100–100) |