This study was aimed to investigate the influence of coital frequency and masturbation on erectile dysfunction (ED) in Chinese patients. A total of 332 male outpatients with or without ED and volunteers were recruited from Zhongnan Hospital, Wuhan University, China. ED was assessed by using the five-item International Index of Erectile Function scale and the frequency of intercourse by patients' self-report. After adjusting for lifestyle factors and diseases-related factors, the analyses showed that coital and masturbation in a certain frequency tended to decrease the risk of ED. Men reporting intercourse once a week had lower risk of ED than those did less than once a week, with age, hyperlipidemia, hypertension, diabetes, body mass index, smoking, and drinking as covariates (P=0.67, adjusted odds ratio [OR] = 0.84; 95% confidence interval [CI]: 0.37-1.88). For those reporting coital frequency two times per week and three or more times per week, there were 63% (adjusted OR = 0.37; 95% CI: 0.18-0.77) and 85% (adjusted OR = 0.15; 95% CI: 0.07-0.35) lower risk of ED than those reporting intercourse frequency less than once per week, respectively (P<0.05). Results indicated that maintaining a regular frequency of intercourse can reduce the risk of ED for males aged among 30 to 75 years.

ObjectiveTo investigate the feasibility of repairing surgically ablated cavernous nerves by using an interposition genitofemoral nerve graft and with nerve growth enhancing media (insulin-like growth factor-I,IGF-I) injection.MethodsA total of 54 male adult Sprague-Dawley rats were randomly divided into 3 groups (each of 18 rats),including sham operation controls, bilateral cavernous nerve ablation and nerve graft with IGF-I injection groups.At 1,3 and 6 months after surgery, the rat models were evaluated with Apomorphine Test.Then nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) staining was used to identify nNOS in penile nerve fibers of the proximal portion of penile shaft.ResultsAt 1,3 and 6 months after surgery, the rats of sham operation group had normal erectile function (erection rate,100%),while the rats of nerve ablation group lost erectile function at all (erection rate,0%).There was no statistically significant difference of ED between the nerve ablation and nerve graft groups at 1 month;however,at 3 and 6 months,Apomorphine Test resulted in tumescence of 50% and 66.7% of the nerve graft groups vs 0% and 0% of the nerve ablation groups, respectively ( P

This study was aimed to investigate the influence of coital frequency and masturbation on erectile dysfunction (ED) in Chinese patients. A total of 332 male outpatients with or without ED and volunteers were recruited from Zhongnan Hospital, Wuhan University, China. ED was assessed by using the five-item International Index of Erectile Function scale and the frequency of intercourse by patients' self-report. After adjusting for lifestyle factors and diseases-related factors, the analyses showed that coital and masturbation in a certain frequency tended to decrease the risk of ED. Men reporting intercourse once a week had lower risk of ED than those did less than once a week, with age, hyperlipidemia, hypertension, diabetes, body mass index, smoking, and drinking as covariates (P=0.67, adjusted odds ratio [OR] = 0.84; 95% confidence interval [CI]: 0.37-1.88). For those reporting coital frequency two times per week and three or more times per week, there were 63% (adjusted OR = 0.37; 95% CI: 0.18-0.77) and 85% (adjusted OR = 0.15; 95% CI: 0.07-0.35) lower risk of ED than those reporting intercourse frequency less than once per week, respectively (P<0.05). Results indicated that maintaining a regular frequency of intercourse can reduce the risk of ED for males aged among 30 to 75 years.
Adult ; Age Distribution ; Aged ; China ; epidemiology ; Coitus ; Cross-Sectional Studies ; Erectile Dysfunction ; epidemiology ; prevention & control ; Humans ; Male ; Middle Aged ; Prevalence ; Risk Assessment ; Sexual Behavior ; statistics & numerical data

Objective To investigate the serum prostate specific antigen tPSA),ratio of serum free PSA to total PSA (f/t),prostate volume (PV) and prostate specific antigen density (PSAD),their correlation with prostatic intraepithelial neoplasia (PIN) and their clinical diagnostic significance. Methods Retrospectively evaluate 165 cases of patients with PIN ( including 31 cases of LGPIN,134 cases of HGPIN),which confirmed by pathology,and 252 cases of benign prostatic hyperplasia (BPH),49 patients with prostate cancer (PCa),both diagnosed by pathology,as control.The average age of BPH,LGPIN,HGPIN,PCa groups were 70.13 ± 0.43,70.97 ± 1.28,70.74 ± 0.64,70.37 ± 1.40,the International Prostate Symptom Score (IPSS) were 20.20 ± 0.88,14.71 ± 3.42,20.19 ± 1.239,19.27 ± 2.73,and the PV were 58.07 ± 3.58,56.01 ± 7.52,60.74 ± 4.81,47.56 ± 6.54,respectively.The data of PSA,f/t,PV and PSAD were analyzed and compared within the four groups. Results Age,IPSS score and PV had no significant difference among the four groups (P ＞ 0.05).The PSA level of BPH,LGPIN,HGPIN,PCa groups were 5.65 ±0.38,5.86 ±0.81,8.91 ±0.71,13.80 ±1.83,the f/t ratio were 0.26 ±0.01,0.24 ±0.02,0.22 ±0.01,0.167 ± 0.01,and the PSAD level were 0.11 ± 0.01,0.10 ± 0.02,0.19 ±0.03,0.48 ±0.12,respectively.PSA,f/t and PSAD were not significantly different between HGPIN and LGPIN ( P ＞ 0.05 ),and likewise between LGPIN and BPH patients ( P ＞ 0.05 ).PSA,f/t and PSAD were significantly different between LGPIN and PCa patients ( P ＜ 0.05),and likewise between HGPIN and BPH patients (P ＜ 0.05 ).PSA and PSAD were significantly different between HGPIN and PCa (P ＜ 0.05 ).The areas under the ROC curve of PSA and PSAD of HGPIN were 0.6281 (P ＜0.01 ) and 0.5919 (P ＜0.05).Conclusions PSA and PSAD are correlated with HGP1N and can predict the existence of HGPIN early;PSAD can identify HGPIN and PCa,when PSA and f/t are normal.The clinical features of LGPIN are similar to BPH,and HGPIN is easy to develop to PCa.