Converts IHS4 numerical scores to character values.
References
Zouboulis, C C et al. “Development and validation of the International Hidradenitis Suppurativa Severity Score System (IHS4), a novel dynamic scoring system to assess HS severity.” The British journal of dermatology vol. 177,5 (2017): 1401-1409. doi:10.1111/bjd.15748
See also
Other IHS4:
ihs4_num()
Examples
ihs4_char(c(2, 5, 12))
#> [1] "Mild" "Moderate" "Severe"