Premature menopause was independently associated with CHIP. Associations were larger for natural premature menopause but smaller and non-significant for surgical premature menopause. Models for both cohorts are adjusted for age, the first 10 principal components of ancestry, ever-smoking, diabetes mellitus, and use of hormone therapy. WHI models are further adjusted for race/ethnicity, enrollment in the WHI observational study vs. clinical trial, and whether women were randomized to hormone therapy vs. placebo. WHI = Women’s Health Initiative; CHIP = clonal hematopoiesis of indeterminate potential; VAF = variant allele frequency.