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Int J Impot Res. 2018 Aug;30(4):158-162. doi: 10.1038/s41443-018-0039-1. Epub 2018 Jun 21.

Does underestimated penile size impact erectile function in healthy men?

Author information

1
Pontifical Catholic University of Campinas, PUC-Campinas, São Paulo, Brazil.
2
University of Campinas, PUC-Campinas, São Paulo, Brazil.
3
Paulínia Municipal Hospital, PUC-Campinas, São Paulo, Brazil.
4
Pontifical Catholic University of Campinas, PUC-Campinas, São Paulo, Brazil. reisleo.l@gmail.com.
5
University of Campinas, PUC-Campinas, São Paulo, Brazil. reisleo.l@gmail.com.
6
Paulínia Municipal Hospital, PUC-Campinas, São Paulo, Brazil. reisleo.l@gmail.com.

Abstract

The aim of this study is to assess the impact of objective (stretched) and subjective penile size in the erectile function in a urological check-up program on a cross-sectional study including 689 men aged 35-70 years. IIEF-5 questionnaire, physical examination (penile length, prostate volume, blood pressure, body mass index-BMI), metabolic syndrome (MS), comorbidities, habits (sexual intercourse frequency, physical activity, alcohol, and tobacco use), level of education, serum glucose, total testosterone, estradiol, PSA, lipid profile, and self-perceptions (ejaculation time and subjective penile size) were examined in multivariate models using logistic and linear regressions. Penile objective mean length was 13.08 cm ± 2.32 and 67 (9.72%) patients referred small penis self-perception. Seventy-six (11.03%) participants had severe erectile dysfunction (ED), 75 (10.88%) had mild to moderate and moderate ED, 112 (16.25%) had mild ED and 426 (61.83%) had no ED. Risk factors for ED that held statistical significance were self-perceived small penis (OR = 2.23, 95% CI 1.35-3.69, p = .0017), sexual intercourse frequency (per week) (OR = 0.45, 95% CI 0.38-0.52, p < .0001), satisfactory ejaculation time (no vs. yes, OR = 2.06, 95% CI 1.46-2.92, p < .0001), comorbidity (yes vs. no, OR = 2.01, 95% CI 1.46-2.76, p < .0001), age >65 years (OR = 2.93, 95% CI 1.53-5.61, p < .0001), tobacco use (yes vs. no, OR = 1.41, 95% CI 1.02-1.96, p < .0375), regular physical activity (no vs. yes, OR = 1.59, 95% CI 1.13-2.23, p < .0083), serum total testosterone < 200 ng/dl (OR = 3.48, 95% CI 1.69-7.16, p = 0.0009), serum glucose > 100 mg/dl (OR = 1.69, 95% CI 1.18-2.43, p = 0.0044) and systolic blood pressure > 130 mmHg (OR = 1.60, 95% CI 1.16-2.19, p = 0.0037). Results suggest that in addition to previously reported risk factors, patient's subjective impressions of penile size negatively impacts sexual life in about 10% of men considered healthy, while objective penile length does not play significant role in erectile function.

PMID:
29925936
DOI:
10.1038/s41443-018-0039-1
[Indexed for MEDLINE]

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