Incidence of alopecia areata recorded in UK primary care, adults and children, 2009 to 2018

0·26 per 1000 person-years

people newly diagnosed per 10,000 person-years, UK (Oxford-RCGP Research and Surveillance Centre primary care records, 4.16 million people)

“The AA incidence rate was 0·26 per 1000 person-years.”

Harries et al., The epidemiology of alopecia areata: a population-based cohort study in UK primary care, Br J Dermatol 2022 (PubMed 34227101), 2021-10-21

Kind of source

Peer-reviewed study

Read on

2026-11-07

Daily check

Quote found at the source on 2026-11-07

What to know

First recorded GP diagnoses, so people who never consult are missed; US insurance-claims and Israeli health-plan studies report rates three to four times higher. GBD 2021 publishes a worldwide count of new alopecia areata cases, but it counts relapsing episodes rather than first diagnoses, so it was not used.

Arithmetic

0.26 per 1,000 person-years x 10 = 2.6 per 10,000 person-years.

About

Alopecia areata