Table 1.
Demographic and physical characteristics of participants and nonparticipants in the type 2 diabetes population of the Dongguan Eye Study.
| Variables | Non-participants (n = 152) No. of persons (%) or Mean ± SD | Participants (n = 1348) No. of persons (%) or Mean ± SD | P |
|---|---|---|---|
| Gender | 0.276 | ||
| Male | 69 (45.4) | 550 (40.8) | |
| Female | 83 (54.6) | 798 (59.2) | |
| Age (yrs) | |||
| Mean ± SD | 58.7 ± 13.6 | 59.6 ± 11.0 | 0.458 |
| 40–49 | 44 (29.0) | 296 (22.0) | 0.183 |
| 50–59 | 40 (26.3) | 390 (28.9) | |
| 60–69 | 39 (25.7) | 419 (31.1) | |
| 70–79 | 18 (11.8) | 177 (13.1) | |
| ≥80 | 11 (7.2) | 66 (4.9) | |
| Education | 0.827 | ||
| High school and above | 21 (13.8) | 151 (11.2) | |
| Junior middle school | 48 (31.6) | 422 (31.3) | |
| Primary school | 58 (38.2) | 657 (48.7) | |
| No education | 25 (16.5) | 118 (8.8) | |
| Occupation | 0.348 | ||
| Farmers | 86 (56.6) | 648 (48.1) | |
| Workers | 8 (5.3) | 102 (7.6) | |
| Technicians | 1 (0.7) | 20 (1.5) | |
| Civil servants | 2 (1.3) | 26 (1.9) | |
| Self-employed | 8 (5.3) | 47 (3.5) | |
| Retirees | 29 (19.1) | 314 (23.3) | |
| Others | 18 (11.8) | 191 (14.2) | |
| BMI (kg/m2) | 26.1 ± 4.2 | 26.2 ± 3.8 | 0.647 |
| Waist-hip-ratio | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.211 |
| Mean SBP (mmHg) | 143.6 ± 24.6 | 141.6 ± 20.1 | 0.341 |
| Mean DBP (mmHg) | 79.8 ± 12.2 | 78.4 ± 11.0 | 0.199 |
| FBG (mmol/l) | 7.6 ± 2.9 | 7.6 ± 2.9 | 0.861 |
| HbA1c (%) | 7.0 ± 1.6 | 7.1 ± 1.7 | 0.918 |
SD: Standard deviation; BMI: body mass index; SBP: systolic blood pressure; DBP: diastolic blood pressure; FBG: fasting blood glucose; HbA1C: glycosylated haemoglobin. BMI = weight (kg)/height (m2). Waist-hip-ratio = waist circumference (cm)/hip circumference (cm).