ABSTRACT
Background Experimental studies have shown that radiofrequency electromagnetic waves emitted by mobile phones can cause adverse effects on male reproductive health, including decreased semen quality and altered sex hormones. However, the results of epidemiological studies on the relationship between mobile phone use and male semen quality are inconsistent. Furthermore, there are few epidemiological studies on the association of mobile phone use with sex hormones. Objective To explore the associations of mobile phone use with male semen quality and sex hormones. Methods A total of 2045 men visited the reproductive medicine center of a hospital in Wuhan and ordered infertility examination were recruited from December 2018 to January 2020. Information on mobile phone use was obtained using a questionnaire. Among them, 1232 and 1694 men were eligible for semen quality analyses and sex hormone analyses, respectively. Multiple linear and logistic regression models were used to analyze the associations of mobile phone use with male semen quality and sex hormones. Results After adjusting for potential confounders, there was no statistically significant associations of mobile phone use with sperm progressive motility, sperm total motility, sperm concentration, sperm count, or serum luteinizing hormone (P>0.05). However, serum total testosterone showed a declined tendency with increasing daily duration of mobile phone use (Ptrend=0.08). Compared with men with daily mobile phone use of 0-2 h, men with daily mobile phone use of 2.1-5, 5.1-8, and >8 h showed decreased serum total testosterone concentrations by 6.29% (95%CI: 0.40%-11.84%), 6.01% (95%CI: 0.60%-12.19%), and 7.87% (95%CI: 0.40%-14.79%), respectively. Conclusion Mobile phone use is not associated with male semen quality and serum luteinizing hormone, but increasing daily duration of mobile phone use is potentially associated with a tendency to lower male serum total testosterone.
ABSTRACT
@#Objective To investigate the evaluation of high-resolution computed tomography (HRCT) in patients with chronic obstructive pulmonary diseases (COPD), and the relationship with the pulmonary function test and BODE index.Methods 32 COPD patients and 22 normal controls were examined by pulmonary function test (PFT) and HRCT. The data of two groups were compared.Results The volume and pixel index (PI) in forced expiration were higher in the COPD group than those in the control group ( P<0.01), but there was no significant difference in Vin between two groups ( P>0.05). In the COPD group, Vex and Vin were negatively correlated with FEV1/FVC ( P<0.05) respectively. There were no correlation between Vin, Vex and FEV1% pre in the COPD patients ( P>0.05) respectively. Vin and Vex were not correlated with BODE index (all P>0.05) respectively. The ratio of Vex/Vin was positively correlated with BODE index ( P<0.05), and not correlated with FEV1/FVC ( P>0.05). PI910ex was positively correlated with BODE index ( P<0.01), and negatively correlated with FEV1%pre, FEV1/FVC (all P<0.05) respectively.Conclusion The pulmonary function of COPD patients can be evaluated by HRCT, especially by PI910ex.