Table 3. The associations of abnormal semen quality with age and anthropometric indexes.
| Characteristics | Quartile | Concentration < 15 M/ml, n (%) | Total Motility < 40%, n (%) | Progressive Motility < 32%, n (%) | Normal Morphology < 30%, n (%) |
|---|---|---|---|---|---|
| Age (years) | Q1: <29 | 142 (8.0) | 49 (2.8) | 295 (16.7) | 9 (0.5) |
| Q2: 29–30 | 145 (9.1) | 56 (3.7) | 266 (16.7) | 8 (0.5) | |
| Q3: 31–33 | 207 (10.0) | 76 (3.7) | 391 (19.0) | 11 (0.5) | |
| Q4: ≥34 | 242 (11.0) | 183(8.4) | 558 (25.6) | 30 (1.4) | |
| p a | 0.011 | <0.001 | <0.001 | 0.002 | |
| BMI (kg/m 2) | Q1: <21.60 | 170 (8.9) | 85 (4.5) | 362 (19.0) | 9 (0.5) |
| Q2: 21.60–23.48 | 186 (9.7) | 92 (4.8) | 376 (19.8) | 10 (0.5) | |
| Q3: 23.49–25.61 | 164 (8.6) | 96 (5.0) | 375 (19.7) | 17 (0.9) | |
| Q4: ≥25.62 | 216 (11.3) | 91 (4.8) | 397 (20.9) | 22 (1.2) | |
| p a | 0.020 | 0.869 | 0.537 | 0.049 | |
| Waist circumference (cm) | Q1: <75.00 | 130 (8.0) | 65 (4.0) | 311 (19.2) | 9 (0.6) |
| Q2: 75.00–79.00 | 172 (9.6) | 97 (5.4) | 373 (20.9) | 15 (0.8) | |
| Q3: 80.00–85.00 | 206 (9.8) | 100 (4.8) | 390 (18.6) | 16 (0.8) | |
| Q4: ≥86.00 | 227 (10.9) | 100 (4.8) | 428 (20.6) | 18 (0.9) | |
| p a | 0.038 | 0.282 | 0.201 | 0.721 | |
| Hip circumference (cm) | Q1: <92.00 | 137 (8.4) | 72 (4.4) | 315 (19.3) | 9 (0.6) |
| Q2: 92.00–95.99 | 181 (9.4) | 93 (4.8) | 390 (20.2) | 10 (0.5) | |
| Q3: 96–99.99 | 187 (9.6) | 99 (5.1) | 379 (19.6) | 14 (0.7) | |
| Q4: ≥100 | 230 (11.0) | 98 (4.7) | 418 (20.1) | 25 (1.2) | |
| p a | 0.057 | 0.796 | 0.899 | 0.052 | |
| Waist-to-hip ratio (%) | Q1: <80 | 135 (9.5) | 72 (5.1) | 278 (19.6) | 11 (0.8) |
| Q2: 80–83 | 200 (9.3) | 95 (4.4) | 435 (20.4) | 17 (0.8) | |
| Q3: 84–87 | 204 (9.6) | 92 (4.3) | 417 (19.6) | 14 (0.7) | |
| Q4: ≥88 | 196 (10.3) | 103 (5.4) | 372 (19.6) | 16 (0.8) | |
| p a | 0.774 | 0.325 | 0.893 | 0.920 | |
| Waist-to-height ratio (%) | Q1: <44 | 165 (8.7) | 87 (4.6) | 368 (19.4) | 12 (0.6) |
| Q2: 44–46 | 186 (9.9) | 84 (4.5) | 367 (19.5) | 13 (0.7) | |
| Q3: 47–49 | 180 (9.5) | 91 (4.8) | 381 (20.2) | 17 (0.9) | |
| Q4: ≥50 | 204 (10.5) | 100 (5.2) | 386 (20.1) | 16 (0.8) | |
| p a | 0.266 | 0.735 | 0.905 | 0.764 | |
| Body fat (%) | Q1: <19.80 | 181 (9.7) | 98 (5.3) | 386 (20.8) | 14 (0.8) |
| Q2: 19.80–23.29 | 181 (9.4) | 99 (5.1) | 400 (20.8) | 11 (0.6) | |
| Q3: 23.30–26.79 | 183 (9.6) | 83 (4.4) | 353 (18.6) | 16 (0.8) | |
| Q4: ≥26.80 | 191 (9.9) | 83 (4.3) | 367 (19.2) | 16 (0.8) | |
| P a | 0.943 | 0.375 | 0.213 | 0.745 | |
| Smoking duration (years) | Q1: 0 | 13 (6.9) | 6 (3.2) | 40 (21.2) | 1 (0.5) |
| Q2: <3 | 441 (9.5) | 246 (5.3) | 946 (20.4) | 33 (0.7) | |
| Q3: 3–20 | 101 (9.6) | 33 (3.1) | 185 (17.7) | 8 (0.8) | |
| Q4: ≥20 | 181 (10.5) | 79 (4.6) | 337 (19.6) | 16 (0.9) | |
| P a | 0.078 | 0.097 | 0.122 | 0.197 |
a by the Chi-square test.