Sexual Habits Affect Penis Size in Adulthood

Overview

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.

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.

Conditions

Interventions

Eligibility

Locations (1)

Outcomes