ShiP: Sexual Habits Affect Penis Size in Adulthood

Sponsor

University Medical Center, Kazakhstan (Other)

Overall Status

Completed

CT.gov ID

NCT05654974

Collaborator

(none)

282

Enrollment

Location

Actual Duration (Months)

20.1

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

Purpose: to assess in Kazakh adult males erect penis sizes, and study an influence of their natural physiological events and behavioral habits during their growing ages on their penile sizes nowadays.

Study Design: An observational cross-sectional survey pilot study using a correlational design with the intention-to-treat principle.

Condition or Disease	Intervention/Treatment	Phase
Observational Study	Other: measurements and questionnaire

Detailed Description

Participants. A total of 282 adult Kazakh males from the Republic of Kazakhstan and who have been visited at the urology units of three university centers in the biggest cities of the Republic of Kazakhstan (Astana, Almaty, and Karaganda) were prospectively included in the study, which took place between January 2020 and January 2021.

Measurements of the penis erect length and girth were by two doctor-urologists according to the method of Veale D et al. (2015).

Statistical analysis. Two-tailed Student's t-test, Pearson correlation and multivariate tests of the MANOVA and MANCOVA (body height as covariate) were used.

Sample size estimation. In a cross-sectional observational study in assessment of erect penis size of Kazakh adult males we supposed that the primary interest lies in assessment of erect penis sizes in the three cities (k=3). The investigators wish to be 95% sure of detecting when the mean erect penis sizes not exceed 1 mm (i.e., 1-β=0.95, and m1=1, m2=0). The standard deviation of erect penis size is likely to be 1.56 mm (i.e. SD=1.56) with a statistical power of 95% and significance level of 2.5% with the Bonferroni correction based on one-sided hypothesis testing. At the 5% Type I error rate (i.e., α=0.05), the sample size of the survey is 196.

Study Design

Study Type:

Observational

Actual Enrollment :

282 participants

Observational Model:

Case-Crossover

Time Perspective:

Cross-Sectional

Official Title:

Sexual Habits in Childhood Affect Penis Size in Later Adulthood: a Cross-sectional Study

Actual Study Start Date :

Dec 1, 2019

Actual Primary Completion Date :

Nov 30, 2020

Actual Study Completion Date :

Jan 31, 2021

Outcome Measures

Primary Outcome Measures

erect penis length and girth [baseline]
centimeter

Eligibility Criteria

Criteria

Ages Eligible for Study:

23 Years to 35 Years

Sexes Eligible for Study:

Male

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

male gender aged from 23 to 35 years
fill out the questionnaire
BMI ≤ 29.9 kilogram per meter square
a male who has at least one healthy native child
no non-communicable chronic diseases.

Exclusion Criteria:

female gender
BMI ≥ 30.0 kilogram per meter square
infertility
erectile dysfunction, previous pelvic surgery, suspected hypogonadism, penile disease, or deformity
specific treatment with androgens
alcohol or drug abuse
history of alcohol consumption ≥ 30 g/day within the past 5 years.