Table 4. The odds ratio (OR) and 95% confidence interval (CI) of abnormal semen quality with age and anthropometric indexes.
| Characteristics | Quartile | Concentration < 15 M/ml, OR (95% CI) | Total Motility < 40%, OR (95% CI) | Progressive Motility < 32%, OR (95% CI) | Normal Morphology < 30%, OR (95% CI) |
|---|---|---|---|---|---|
| Age (years) | Q1: <29 | Reference | Reference | Reference | Reference |
| Q2: 29–30 | 1.15 (0.90, 1.46) | 1.28 (0.87, 1.89) | 1.00 (0.84, 1.20) | 0.99 (0.38, 2.57) | |
| Q3: 31–33 | 1.28 (1.02, 1.60) | 1.35 (0.94, 1.94) | 1.17 (0.99, 1.38) | 1.05 (0.44, 2.54) | |
| Q4: ≥34 | 1.42 (1.15, 1.77) | 3.22 (2.33, 4.44) | 1.72 (1.47, 2.01) | 2.72 (1.29, 5.75) | |
| BMI (kg/m 2) | Q1: <21.60 | Reference | Reference | Reference | Reference |
| Q2: 21.60–23.48 | 1.10 (0.89, 1.37) | 1.09 (0.80, 1.47) | 1.05 (0.89, 1.23) | 1.11 (0.45, 2.74) | |
| Q3: 23.49–25.61 | 0.96 (0.77, 1.20) | 1.14 (0.84, 1.53) | 1.05 (0.89, 1.23) | 1.90 (0.84, 4.26) | |
| Q4: ≥25.62 | 1.31 (1.06, 1.61) | 1.08 (0.79, 1.46) | 1.13 (0.96, 1.32) | 2.46 (1.13, 5.36) | |
| Waist circumference (cm) | Q1: <75.00 | Reference | Reference | Reference | Reference |
| Q2: 75.00–79.00 | 1.22 (0.96, 1.55) | 1.38 (0.99, 1.908) | 1.11 (0.94, 1.32) | 1.52 (0.66, 3.48) | |
| Q3: 80.00–85.00 | 1.241 (0.99,1.56) | 1.19 (0.87, 1.64) | 0.96 (0.81, 1.13) | 1.37 (0.60, 3.11) | |
| Q4: ≥86.00 | 1.40 (1.11, 1.75) | 1.21 (0.88, 1.66) | 1.09 (0.93, 1.28) | 1.56 (0.70, 3.47) | |
| Hip circumference (cm) | Q1: <92.00 | Reference | Reference | Reference | Reference |
| Q2: 92.00–95.99 | 1.13 (0.90, 1.43) | 1.10 (0.80, 1.50) | 1.06 (0.90, 1.25) | 0.94 (0.38, 2.32) | |
| Q3: 96.00–99.99 | 1.17 (0.93, 1.47) | 1.17 (0.86, 1.60) | 1.02 (0.86, 1.20) | 1.32 (0.57, 3.05) | |
| Q4: ≥100 | 1.35 (1.08, 1.69) | 1.07 (0.78, 1.46) | 1.05 (0.89, 1.23) | 2.19 (1.02, 4.70) | |
| Waist-to-hip ratio (%) | Q1: <80 | Reference | Reference | Reference | Reference |
| Q2: 80–83 | 0.98 (0.78, 1.24) | 0.87 (0.64, 1.19) | 1.00 (0.84, 1.19) | 1.03 (0.48, 2.20) | |
| Q3: 84–87 | 1.01 (0.80, 1.27) | 0.85 (0.62, 1.16) | 1.05 (0.90, 1.23) | 0.85 (0.38, 1.87) | |
| Q4: ≥88 | 1.09 (0.87, 1.37) | 1.07 (0.79, 1.46) | 1.00 (0.86, 1.17) | 1.08 (0.50, 2.34) | |
| Waist-to-height ratio (%) | Q1: <44 | Reference | Reference | Reference | Reference |
| Q2: 44–46 | 1.15 (0.92, 1.43) | 0.97 (0.72, 1.32) | 1.01 (0.86, 1.18) | 1.09 (0.50, 2.40) | |
| Q3: 47–49 | 1.11 (0.90, 1.39) | 1.06 (0.78, 1.43) | 1.05 (0.90, 1.23) | 1.43 (0.68, 3.01) | |
| Q4: ≥50 | 1.24 (1.00, 1.54) | 1.14 (0.85, 1.53) | 1.04 (0.90, 1.22) | 1.31 (0.62, 2.78) | |
| Body fat (%) | Q1: <19.80 | Reference | Reference | Reference | Reference |
| Q2: 19.80–23.29 | 0.96 (0.77, 1.19) | 0.97 (0.73, 1.29) | 0.99 (0.85, 1.17) | 0.76 (0.34, 1.67) | |
| Q3: 23.30–26.79 | 0.98 (0.79, 1.22) | 0.82 (0.61, 1.11) | 0.87 (0.74, 1.02) | 1.12 (0.54, 2.29) | |
| Q4: ≥26.80 | 1.02 (0.83, 1.27) | 0.81 (0.60, 1.10) | 0.90 (0.77, 1.06) | 1.11 (0.54, 2.28) | |
| Smoking duration (years) | Q1: 0 | Reference | Reference | Reference | Reference |
| Q2: <3 | 1.42 (0.80, 2.51) | 1.71 (0.75, 3.89) | 0.96 (0.67, 1.36) | 1.35 (0.18, 9.88) | |
| Q3: 3–20 | 1.44 (0.79, 2.62) | 0.99 (0.41, 2.40) | 0.80 (0.54, 1.17) | 1.44 (0.18, 11.60) | |
| Q4: ≥20 | 1.58 (0.88, 2.83) | 1.46 (0.63, 3.40) | 0.91 (0.63, 1.31) | 1.75 (0.23, 13.31) |