Research
Hormonal
Testosterone deficiency, specifically low calculated free testosterone (cFT), is highly prevalent in men with type 1 diabetes (20.3%), contradicting the assumption that low testosterone is specific to type 2 diabetes.
Men with type 1 diabetes should be screened for low testosterone, as it is common (affecting ~1 in 5 men) and linked to insulin resistance, not just age.
GoodRefutesHIGH confidence
By contrast, 20.3% of men with type 1 diabetes had low calculated free testosterone, similar to that observed in type 2 diabetes (age-body mass index adjusted odds ratio = 1.4; 95% confidence interval = 0.7–2.9).
Why this rating
Large cohort of type 1 diabetes (n=69) compared against type 2, with rigorous statistical adjustment.
Source
Low Testosterone Levels Are Common and Associated with Insulin Resistance in Men with Diabetes
Mathis Grossmann et al. · The Journal of Clinical Endocrinology & Metabolism · 2008
DOI 10.1210/jc.2007-2177
cross_sectional · n=649Cited 460×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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