Association between sedentary time and semen quality in adult men: a hospital-based cross-sectional survey
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摘要:
目的 探究男性静坐时长与主要精液质量参数的相关性。 方法 采用横断面研究方法,招募2017 — 2019年在深圳市某医院生殖中心进行生育咨询的4 532名男性进行问卷调查,采用计算机辅助精液分析设备检测精液质量常规参数(精子总数、精子浓度、总活动率、前向运动率),采用二元logistic回归模型分析静坐时长与精液质量参数间的关系。 结果 精子前向运动率:与静坐时长 < 4 h/d组[(55.29 ± 19.15)%]相比,静坐时长 ≥ 8 h/d组[(53.18 ± 19.59 %)]较低,差异有统计学意义(F = 2.96,P < 0.05);精子总活动率:与静坐时长4 h/d ~ 组[(66.57 ± 19.50 %)]相比,静坐时长 ≥ 8 h/d组(64.30 ± 20.16 %)较低,差异有统计学意义(F = 3.19,P < 0.05)。logistic回归结果显示,未校正混杂因素时,静坐时长 ≥ 8 h/d组精子前向运动率降低的风险[OR(95 %CI)]是 < 4 h/d组的1.28倍(1.02~1.60);校正混杂因素后,静坐时长 ≥ 8 h/d组仍与精子前向运动率的下降风险增加有关(P < 0.05)。 结论 久坐( ≥ 8 h/d)是男性精子前向运动率下降的风险因素。 Abstract:Objective To investigate the relationship between semen quality and sedentary time. Methods A cross-sectional survey was conducted among 4 532 men (aged 18 – 60 years) seeking fertility consultation at a reproductive center of a hospital in Shenzhen city from March 2017 through May 2019. Questionnaire interview and semen sampling were carried out among the participants. Routine indicators of semen quality were determined with a computer assisted semen analysis system (CASA) and the relationship between sedentary time and semen quality indicators was assessed with binary logistic regression analysis. Results In comparison to those in the participants reporting the sedentary time of less than 4 hours per day, significantly lower sperm progressive motility rate (53.18 ± 19.59% vs. 55.29±19.15%, F = 2.96; P < 0.05) and total sperm motility rate (64.30 ± 20.16% vs. 66.57 ± 19.50%, F = 3.19; P < 0.05) were detected in the men reporting the sedentary time of 8 hours and above per day. The results of logistic regression analysis showed that compared to those with the sedentary time of less than 4 hours per day, the participants with the sedentary time of 8 hours and above per day were at a significantly increased risk of having a reduced sperm progressive motility (odds ratio = 1.29, 95% confidence interval: 1.03 – 1.62) after adjusting for age, body mass index, days of abstinence, smoking, alcohol drinking, and time of physical activity. Conclusion Prolonged sedentary time (≥ 8 h/day) is a risk factor for decreased sperm progressive motility in adult men. -
Key words:
- sedentary behavior /
- semen quality /
- physical activity /
- epidemiological study
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表 1 研究人群一般人口学特征及每日静坐时长分布
变量 人数 % 每日静坐时间(h) χ2 值 P 值 < 4 4~ 6~ ≥ 8 人数 % 人数 % 人数 % 人数 % 禁欲时间(d) 11.36 0.078 < 3 532 11.7 182 11.4 123 11.2 88 10.0 139 14.4 3~5 3196 70.5 1121 70.5 775 70.5 625 71.3 675 69.9 > 5 804 17.7 287 18.1 202 18.4 163 18.6 152 15.7 饮酒频率(次/周) 19.21 < 0.001 < 1 3791 83.6 1294 81.4 905 82.3 748 85.4 844 87.4 ≥ 1 741 16.4 296 18.6 195 17.7 128 14.6 122 12.6 吸烟情况 108.09 < 0.001 从不吸烟 2393 52.8 704 44.3 553 50.3 531 60.6 605 62.6 吸烟 2139 47.2 886 55.7 547 49.7 345 39.4 361 37.4 运动时长(h/周) 82.11 < 0.001 0 2195 48.4 849 53.4 476 43.3 346 39.5 524 54.2 0~ 444 9.8 158 9.9 117 10.6 90 10.3 79 8.2 1~ 962 21.2 294 18.5 259 23.5 203 23.2 206 21.3 ≥ 3 931 20.5 289 18.2 a 248 22.5 a 237 27.1 157 16.3 a 注:与6~组比较,a P < 0.001。 表 2 每日不同静坐时间精液质量情况
静坐时间(h/d) 前向运动率(%) 精子浓度( × 106/mL) 精子总数( × 106/一次射精) 总活动率(%) M P25~P75 M P25~P75 < 4 55.29 ± 19.15 a 69.4 39.0~111.3 255.6 137.2~406.7 66.50 ± 19.33 a 4~ 55.28 ± 19.11 a 70.8 42.4~113.3 255.9 145.5~410.4 66.57 ± 19.50 a 6~ 54.96 ± 18.92 a 73.8 44.5~116.6 265.9 151.0~428.2 66.11 ± 19.17 a ≥ 8 53.18 ± 19.59 73.3 41.0~119.5 248.9 138.7~423.4 64.30 ± 20.16 F 值 2.96 4.88 3.55 3.19 P 值 0.03 0.16 0.32 0.02 注:与 ≥ 8 h/d组比较,a P < 0.001。 表 3 静坐时长与精子浓度的关联性
静坐时长(h/d) 对照组 β $S_{\bar x}$ Wald χ2 值 P 值 P趋势 值 OR 值 95 % CI 模型1 < 4 0.586 4~ – 0.26 0.15 2.85 0.091 0.77 0.57~1.04 6~ – 0.38 0.17 5.01 0.025 0.68 0.49~0.95 ≥ 8 – 0.00 0.15 0.00 0.986 0.98 0.75~1.33 模型2 < 4 0.542 4~ – 0.25 0.15 2.70 0.100 0.78 0.58~1.05 6~ – 0.37 0.17 4.62 0.032 0.69 0.49~0.97 ≥ 8 – 0.02 0.15 0.02 0.892 0.98 0.73~1.32 模型3 < 4 0.545 4~ – 0.24 0.15 2.44 0.118 0.79 0.58~1.06 6~ – 0.35 0.17 4.16 0.041 0.70 0.50~0.99 ≥ 8 – 0.02 0.15 0.03 0.871 0.98 0.73~1.31 注:精子浓度赋值:0代表正常,1代表异常,采用enter法纳入变量;模型1是不校正任何混杂因素,模型2校正年龄、体质指数、禁欲时间、饮酒和吸烟,模型3是在模型2的基础上,把运动时长作为协变量纳入回归方程中。 表 4 静坐时长与精子总数的关联性
静坐时长(h/d) 对照组 β $S_{\bar x}$ Wald χ2 值 P 值 P趋势 值 OR 值 95 % CI 模型1 < 4 0.700 4~ – 0.11 0.16 0.44 0.507 0.90 0.65~1.24 6~ – 0.49 0.20 6.13 0.013 0.61 0.42~0.90 ≥ 8 0.06 0.16 0.15 0.70 1.07 0.78~1.46 模型2 < 4 0.658 4~ – 0.11 0.16 0.43 0.512 0.90 0.65~1.24 6~ – 0.48 0.20 5.70 0.017 0.62 0.42~0.92 ≥ 8 0.04 0.17 0.07 0.791 1.05 0.76~1.44 模型3 < 4 0.656 4~ – 0.09 0.16 0.27 0.603 0.92 0.67~1.27 6~ – 0.44 0.20 4.89 0.027 0.64 0.43~0.95 ≥ 8 0.04 0.17 0.04 0.83 1.04 0.75~1.43 注:精子总数赋值:0代表正常,1代表异常,采用enter法纳入变量;模型1是不校正任何混杂因素,模型2校正年龄、体质指数、禁欲时间、饮酒和吸烟,模型3是在模型2的基础上,把运动时长作为协变量纳入回归方程中。 表 5 静坐时长与精子前向运动率的关联性
静坐时长(h/d) 对照组 β $S_{\bar x}$ Wald χ2 值 P 值 P趋势 值 OR 值 95 % CI 模型1 < 4 0.039 4~ – 0.03 0.12 0.05 0.824 0.97 0.77~1.23 6~ 0.05 0.12 0.16 0.691 1.05 0.82~1.34 ≥ 8 0.24 0.12 4.51 0.034 1.28 1.02~1.60 模型2 < 4 0.033 4~ – 0.04 0.12 0.10 0.753 0.96 0.77~1.21 6~ 0.05 0.13 0.17 0.680 1.05 0.83~1.35 ≥ 8 0.25 0.12 4.73 0.030 1.29 1.03~1.62 模型3 < 4 0.032 4~ – 0.03 0.12 0.06 0.806 0.97 0.77~1.22 6~ 0.06 0.13 0.22 0.638 1.06 0.83~1.36 ≥ 8 0.26 0.12 4.78 0.029 1.29 1.03~1.62 注:精子前向运动率赋值:0代表正常,1代表异常,采用enter法纳入变量;模型1是不校正任何混杂因素,模型2校正年龄、体质指数、禁欲时间、饮酒和吸烟,模型3是在模型2的基础上,把运动时长作为协变量纳入回归方程中。 -
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