Table 2.
Characteristics measured at concurrent or previous screening among individuals with type 2 diabetes mellitus who were screening participants, VIP 1992–2013
| Variable | Incident clinically detected diabetes, screening participants (n = 4561) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Confirmed screen-detected diabetes (n = 1024) | Unconfirmed screen-positive individuals (n = 1403) | All (n = 4506) | Previous diabetes-indicative OGTT >1 year before detection (n = 776) | Previous non-diabetic hyperglycaemia (n = 1898) | Previous normoglycaemia (n = 1716) | ||||||
| p value | p value | p value | p value | p value | |||||||
| Age at concurrent or previous screening (years) | 55.1 (6.4) | 53.4 (8.0) | – | 53.4 (7.9) | – | 54.2 (7.3) | – | 54.3 (7.2) | – | 51.9 (8.7) | – |
| Time from screening to first register detection (years) | 0.1 (0.2) | – | – | 8.1 (4.9) | – | 6.2 (4.1) | – | 6.9 (4.5) | – | 10.3 (4.9) | – |
| BMI (kg/m2) | 30.8 (5.6) | 27.8 (4.8) | < 0.001 | 29.7 (4.7) | < 0.001 | 30.3 (5.0) | 0.048 | 29.9 (4.7) | < 0.001 | 29.1 (4.4) | < 0.001 |
| Self-reported overall bad health, n (%) | 397 (38.8) | 459 (32.7) | 0.002 | 1795 (39.8) | 0.741 | 323 (41.6) | 0.455 | 757 (39.9) | 0.588 | 662 (38.6) | 0.993 |
| Systolic blood pressure (mmHg) | 140.9 (18.6) | 136.6 (20.5) | < 0.001 | 139.2 (18.7) | 0.010 | 140.8 (19.2) | 0.967 | 140.3 (18.6) | 0.394 | 137.0 (18.4) | < 0.001 |
| Diastolic blood pressure (mmHg) | 86.2 (10.6) | 83.2 (11.5) | < 0.001 | 85.2 (11.1) | 0.007 | 86.0 (10.8) | 0.638 | 85.4 (10.6) | 0.051 | 84.3 (11.3) | < 0.001 |
| Serum total cholesterol (mmol/l) | 5.6 (1.1) | 5.5 (1.2) | 0.011 | 5.8 (1.2) | < 0.001 | 5.8 (1.2) | 0.002 | 5.7 (1.2) | 0.009 | 5.8 (1.2) | < 0.001 |
Data are reported as mean (SD), unless otherwise stated
Results were not included for 116 individuals who were clinically detected screening participants but had missing information on OGTT results (glycaemic status) from previous screening
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
Missing data: BMI, n = 49; self-reported health, n = 78; systolic BP, n = 82; diastolic BP, n = 83; serum total cholesterol, n = 61
p values are for comparisons with screen-detected diabetes