TABLE 1.

Standardized incidence ratios for penile squamous cell carcinoma overall and according to age at penile lichen sclerosus diagnosis and length of follow‐up.

	Observed (n)	Expected (n)	SIR (95% CI)
Penile LSc	64	4.1	15.5 (12.0–19.5)
Age at penile LSc diagnosis
<40 years	8	0.3	26.0 (11.1–47.1)
≥40 years	56	3.8	14.7 (11.1–18.8)
Length of follow‐up
<1 year	<5	<5	10.3 (1.9–25.2)
1–4 years	<20	<5	14.9 (8.6–22.8)
5–9 years	17	1.1	15.3 (8.9–23.4)
≥10 years	27	1.6	17.1 (11.3–24.2)

Note: Due to data protection rules at Statistics Denmark, fewer than five observed cases are masked.

Abbreviations: CI, confidence interval; LSc, lichen sclerosus; SIR, standardized incidence ratio.