Characteristics | n (%) | Progressive motility (PR, %) | Total motility (PR + NP, %) | |||||
Mean ± SD | t/F | P | Mean ± SD | t/F | P | |||
Sperm motility (PR, PR + NP) | 349 (100.0) | 41.6 ± 20.1 |
|
| 63.4 ± 21.4 |
|
| |
Age (years)a | ≤34 | 169 (48.4) | 42.1 ± 19.9 | 2.809 | 0.062 | 63.6 ± 20.1 | 1.048 | 0.353 |
35 - 39 | 105 (30.1) | 44.2 ± 19.9 | 65.3 ± 20.7 | |||||
≥40 | 75 (21.5) | 37.1 ± 20.4 | 60.2 ± 24.9 | |||||
Ethnicitya | Han | 155 (44.4) | 41.1 ± 19.4 | 0.634 | 0.531 | 63.2 ± 20.8 | 0.935 | 0.393 |
Zhuang | 148 (42.4) | 41.3 ± 21.2 | 62.4 ± 22.3 | |||||
Others | 46 (13.2) | 44.8 ± 19.0 | 67.3 ± 20.8 | |||||
Educationa | Junior school and below | 176 (50.4) | 42.4 ± 20.3 | 0.717 | 0.489 | 64.7 ± 21.4 | 0.848 | 0.429 |
High or technical school | 80 (22.9) | 39.3 ± 20.4 | 61.0 ± 21.7 | |||||
College and above | 93 (26.6) | 42.3 ± 19.6 | 62.9 ± 21.2 | |||||
Job titlea | Industry worker | 73 (20.9) | 37.1 ± 18.7 | 3.650 | 0.027* | 57.2 ± 21.9 | 5.127 | 0.006* |
Farmer | 121 (34.7) | 40.6 ± 21.3 | 62.8 ± 22.7 | |||||
Others | 155 (44.4) | 44.6 ± 19.4 | 66.8 ± 19.5 | |||||
BMI (on WHO criteria, kg/m2)a | Underweight (<18.5) | 19 (5.4) | 46.0 ± 17.1 | 0.458 | 0.712 | 67.0 ± 16.2 | 0.190 | 0.903 |
Normal weight (18.5 - 24.9) | 217 (62.2) | 41.2 ± 20.3 | 63.2 ± 21.8 | |||||
Overweight (25.0 - 29.9) | 98 (28.1) | 42.3 ± 20.8 | 63.2 ± 21.8 | |||||
Obese (≥30.0) | 15 (4.3) | 38.9 ± 16.9 | 62.6 ± 20.7 | |||||
BMI (on China criteria, kg/m2)a | Underweight (<18.5) | 19 (5.4) | 46.0 ± 17.1 | 1.447 | 0.229 | 67.0 ± 16.2 | 1.740 | 0.168 |
Normal weight (18.5 - 23.9) | 178 (51.0) | 40.1 ± 20.2 | 61.7 ± 21.7 | |||||
Overweight (24.0 - 27.9) | 118 (33.8) | 44.1 ± 19.8 | 66.4 ± 20.1 | |||||
Obese (≥28.0) | 34 (9.7) | 38.9 ± 21.7 | 59.6 ± 26.0 | |||||
With organic reproductive diseasesb | No | 267 (76.5) | 43.0 ± 20.9 | 2.467 | 0.015* | 64.6 ± 22.1 | 1.933 | 0.054 |
Yes | 82 (23.5) | 37.4 ± 16.8 | 59.4 ± 18.9 |