Table 2.
Baseline characteristics of the clusters in male population, Tehran Lipid and Glucose Study (1999–2014)
| Variables | Cluster 1 (n = 674) |
Cluster 2 (n = 411) |
Cluster 3 (n = 498) |
Cluster 4 (n = 672) |
Cluster 5 (n = 456) |
Cluster 6 (n = 375) |
Cluster 7 (n = 843) |
*P value |
|---|---|---|---|---|---|---|---|---|
| Age (years) | 53.5(12.4) | 52.3(13.1) | 52.4(14.2) | 51.0(13.4) | 42.4(9.8) | 40.8(9.3) | 43.6(11.5) | < 0.001 |
| Education | ||||||||
| Level 1 (0–8 years) | 520(77.2) | 324(78.8) | 373(74.9) | 507(75.4) | 354(77.6) | 291(77.6) | 634(75.2) | < 0.001 |
| Level 2 (9–12 years) | 98(14.5) | 54(13.1) | 79(15.9) | 113(16.8) | 89(19.5) | 78(20.8) | 173(20.5) | |
| Level 3 (> 12 years) | 56(8.3) | 33(8.1) | 46(9.2) | 52(7.8) | 13(2.9) | 6(1.6) | 36(4.3) | |
| Physical activity level | ||||||||
| Low physical activity | 490(72.7) | 287(69.8) | 326(65.5) | 498(74.1) | 343(75.2) | 279(74.4) | 627(74.4) | 0.005 |
| Smoking | ||||||||
| Never | 291(43.2) | 173(42.1) | 207(41.6) | 296(44.0) | 161(35.3) | 134(35.7) | 256 (30.3) | < 0.001 |
| Past | 133(19.7) | 77(18.7) | 89(17.9) | 125(18.6) | 68(14.9) | 48(12.8) | 111(13.2) | |
| Passive | 73 (10.8) | 50(12.2) | 59(11.8) | 102(15.2) | 66(14.5) | 57(15.2) | 95 (11.3) | |
| Current | 177(26.3) | 111(27.0) | 143(28.7) | 149(22.2) | 161(35.3) | 136(36.3) | 381(45.2) | |
| BMI (kg/m2) | 27.6(3.9) | 26.7(4.1) | 26.2(3.7) | 27.1(3.8) | 28.2(2.6) | 27.9(2.2) | 22.1(2.1) | < 0.001 |
| FPG (mmol/L) | 7.4(2.7) | 7.1(2.3) | 4.9(0.3) | 4.9(0.3) | 4.9(0.4) | 4.9(0.3) | 4.8(0.3) | < 0.001 |
| TC (mmol/L) | 6.2(0.8) | 4.4(0.5) | 4.4(0.5) | 6.1(0.8) | 6.0(0.8) | 4.4(0.5) | 4.9(1.0) | < 0.001 |
| SBP (mmHg) | 130.2(21.2) | 127.8(20.7) | 135.8(16.3) | 134.0(14.7) | 109.2(6.7) | 108.5(7.5) | 106.4(8.2) | < 0.001 |
| Mean number of risk factors | 3.4(0.7) | 2.2(0.7) | 1.6(0.5) | 2.7(0.5) | 2.0(0.0) | 1.0(0.0) | 0.4(0.4) | < 0.001 |
| HBMI | 511(75.8) | 277(67.4) | 302(60.6) | 486(72.3) | 456(100) | 375(100) | 0(0.0) | < 0.001 |
| HSBP | 450(66.8) | 256(62.3) | 498(100) | 672(100) | 0(0.0) | 0(0.0) | 0(0.0) | < 0.001 |
| HTC | 674(100) | 0 (0.0) | 0 (0.0) | 672 (100) | 456 (100) | 0(0.0) | 351(41.6) | < 0.001 |
| HFPG | 674(100) | 411(100) | 0(0.0) | 0(0.0) | 0(0.0) | 0(0.0) | 0(0.0) | < 0.001 |
| Number of events | 29 | 16 | 30 | 27 | 4 | 8 | 18 | |
| Incident rate of cancers (CI), per 1000 person years | 3.6(2.5–5.2) | 3.4(2.0–5.5) | 5.1(3.6–7.3) | 3.2(2.2–4.7) | 0.6(0.2–1.8) | 1.7(0.8–3.5) | 1.7(1.1–2.7) | |
Figures are presented as mean (standard deviation) for continuous variables, and number (percentage) for categorical variables
CI confidence interval, HBMI high body mass index, HFPG high fasting plasma glucose, HTC high total cholesterol, HDL-C high systolic blood pressure
*P values are based on ANOVA test for continuous variables and chi-square test for categorical variables