Verbal descriptor | Corresponding numerical frequency interval |
---|---|
Very common | May affect more than 1 in 10 people (≥ 1/10) |
Common | May affect up to 1 in 10 people (≥ 1/100 to < 1/10) |
Uncommon | May affect up to 1 in 100 people (≥ 1/1000 to < 1/100) |
Rare | May affect up to 1 in 1,000 people (≥ 1/10,000 to < 1/1000) |
Very rare | May affect up to 1 in 10,000 people (< 1/10,000) |
Not known | Frequency cannot be estimated from the available data |