Diagnostic accuracy of the urine glucose test strip by patient characteristics
| Patient characteristic: mean (SD) or % | Diabetic* | Non-diabetic* | ||
| True positive n=33 | False negative n=201 | False positive n=7 | True negative n=1048 | |
| Age | 57 (9.3) | 58 (10.5) | 56 (11.9) | 50 (15.5) |
| Female (%) | 81.8 | 74.6 | 85.7 | 75.3 |
| Venous fasting blood glucose | 207 (75.3) | 166 (73.2) | 95 (16.9) | 90 (13.1) |
| Venous blood glucose 2 hours after OGTT | 310 (60.8) | 275 (62.2) | 115 (43.2) | 120 (31.0) |
| Change in venous blood glucose during OGTT | 160 (50.8) | 146 (49.8) | 20 (47.7) | 30 (30.0) |
| HbA1c | 10 (2.3) | 8 (2.4) | 6 (0.7) | 5 (0.5) |
| BMI | 24 (3.9) | 24 (3.9) | 26 (3.2) | 23 (4.1) |
| High BMI (%) | 33.3 | 36.8 | 57.1 | 29.0 |
| Waist circumference above cut-off (%) | 60.6 | 61.7 | 71.4 | 42.8 |
| Systolic blood pressure | 132 (24.9) | 130 (20.6) | 146(14.0) | 122 (20.2) |
| Diastolic blood pressure | 85 (9.6) | 84 (11.7) | 87 (6.5) | 80 (12.1) |
| Elevated blood pressure (%) | 15.2 | 20.9 | 14.3 | 11.3 |
| Take treatment for high blood pressure (%) | 18.2 | 11.4 | 28.6 | 7.1 |
| Total cholesterol | 242 (62.3) | 227 (69.8) | 240 (63.1) | 213 (56.3) |
| Proteinuria (n=1116)† (%) | 20.0 | 17.2 | 0 | 3.0 |
| Albuminuria (%) | 51.5 | 47.8 | 14.3 | 21.7 |
| Abnormal albumin/creatinine ratio (%) | 39.3 | 39.3 | 14.3 | 17.3 |
Bold, significantly different (P≤0.05) by Student’s t-test or Χ2 test.
*Diagnosis by the composite reference standard: venous OGTT ≥200 mg/dL or cFBG ≥200 mg/dL. Seventy patients with cFBG ≥200 were not tested by OGTT.
†Four missing values; 169 indeterminate measurements not included in analysis.
BMI, body mass index; cFBG, capillary fasting blood glucose; OGTT, oral glucose tolerance test.