Table 1.
Descriptive statistics of participants with type 2 diabetes mellitus, VIP 1992–2013
| Variable | Incident clinically detected diabetes | |||||
|---|---|---|---|---|---|---|
| Total | Confirmed screen-detected diabetes | Unconfirmed screen-positive individuals | All | Screening participants | Screening non- participants | |
| Total | 11,069 (100.0) | 1024 (9.3) | 1403 (12.7) | 8642 (78.1) | 4506 (40.7) | 4136 (37.4) |
| Men | 6459 (58.4) | 595 (58.1) | 783 (55.8) | 5081 (58.8) | 2572 (57.1) | 2509 (60.7) |
| Women | 4610 (41.6) | 429 (41.9) | 620 (44.2) | 3561 (41.2) | 1934 (42.9) | 1627 (39.3) |
| Age at detection, years | ||||||
| Mean ± SD (median) | 58.5 ± 9.7 (59.9) | 55.1 ± 6.4 (59.8) | 53.4 ± 8.0 (59.7) | 59.7 ± 9.9 (60.2) | 61.5 ± 9.0 (62.2) | 57.9 ± 10.4 (58.4) |
| 30–39 | 246 (2.2) | 0 (0.0) | 27 (1.9) | 219 (2.5) | 20 (0.4) | 199 (4.8) |
| 40–49 | 1410 (12.7) | 82 (8.0) | 220 (15.7) | 1108 (12.8) | 441 (9.8) | 667 (16.1) |
| 50–59 | 3296 (29.8) | 335 (32.7) | 406 (28.9) | 2555 (29.6) | 1222 (27.1) | 1333 (32.2) |
| 60–69 | 4494 (40.6) | 607 (59.3) | 750 (53.5) | 3137 (36.3) | 1851 (41.1) | 1286 (31.1) |
| 70+ | 1623 (14.7) | – | – | 1623 (18.8) | 972 (21.6) | 651 (15.7) |
| Year of detection | ||||||
| 1992–1999 | 2012 (18.2) | 217 (21.2) | 369 (26.3) | 1426 (16.5) | 352 (7.8) | 1074 (26.0) |
| 2000–2006 | 3841 (34.7) | 369 (36.0) | 537 (38.3) | 2935 (34.0) | 1426 (31.6) | 1509 (36.5) |
| 2007–2013 | 5216 (47.1) | 438 (42.8) | 497 (35.4) | 4281 (49.5) | 2728 (60.5) | 1553 (37.5) |
| SES in the 1990 censusa | ||||||
| Manual workers | 5516 (49.8) | 479 (46.8) | 701 (50.0) | 4337 (50.2) | 2259 (50.1) | 2089 (50.5) |
| Non-manual workers | 4235 (38.3) | 411 (40.1) | 543 (38.7) | 3285 (38.0) | 1737 (38.5) | 1534 (37.1) |
| Self-employed | 744 (6.7) | 82 (8.0) | 103 (7.3) | 562 (6.5) | 305 (6.8) | 264 (6.4) |
| Undefined | 574 (5.2) | 52 (5.1) | 56 (4.0) | 458 (5.3) | 205 (4.5) | 249 (6.0) |
| Prior CVD eventb | 1420 (12.8) | 55 (5.4) | 53 (3.8) | 1312 (15.2) | 673 (14.9) | 639 (15.4) |
Data are presented as n (%), unless otherwise stated
Unconfirmed screen-positive individuals only had a diabetic screening result, whereas confirmed screen-detected individuals had a diabetic screening result and a medical or prescription record of diabetes within 1 year. Those with clinically detected diabetes were identified in five sources of medical and prescription records, unrelated to screening
aSES imputed for n = 1561 individuals who had missing information
bPrevious CVD events included those coinciding with the date of diabetes detection (n = 227)