A long-term, prospective study of the physiologic and behavioral effects of hormone replacement in untreated hypogonadal men.
Level 3 - non-randomized controlled study
Prospective non-randomized controlled cohort study comparing treated hypogonadal men with two control groups.
What was done
This prospective study tracked previously untreated hypogonadal men before and during hormone replacement therapy, comparing them to normal control men and infertile men with elevated follicle-stimulating hormone (FSH) levels. Nocturnal penile tumescence and rigidity were monitored objectively with a portable recording device, while sexual activity, spontaneous erections, and mood states (depression, anger, fatigue, and confusion) were assessed using prospective self-reported questionnaires in relation to serum androgen levels.
What was found
The abstract does not report numerical values, sample sizes, or exact p-values. Directionally, untreated hypogonadal men exhibited absent or low-amplitude nocturnal erections compared with normal and infertile controls. With hormone replacement, nocturnal erections normalized within 6 to 12 months, lagging behind serum testosterone concentration, which reached the upper range of normal rapidly. Hypogonadal men reported increases in sexual interest and spontaneous erections. Baseline elevations in depression, anger, fatigue, and confusion in hypogonadal men decreased during treatment, though depression scores remained higher than in control groups. Normal and infertile men showed no significant differences from each other on most measures.
Why it matters
It demonstrates that physiological recovery of nocturnal erections and psychological improvements require 6 to 12 months of hormone replacement in hypogonadal men, lagging behind rapid serum testosterone normalization.
Limits
The abstract provides no sample sizes (n is unstated), specific drug formulations, dosages, or numerical statistical values. The study is non-randomized, lacks a placebo control, and relies on subjective self-reporting for sexual and mood outcomes.
Cited by
- supports Julian Davidson at Stanford conducted double-blind, placebo-controlled trials showing testosterone administration improves energy, mood, and libido in hypogonadal men.