. 2022 May 25;158(7):796–800. doi: 10.1001/jamadermatol.2022.1706

Table. Agreement and Correlation Between US, ATC, and Cochrane Review Classification Systems.

Classification system	κ agreement (95% CI)^a		Spearman rank correlation coefficient (95% CI)
Classification system	US classification^b	ATC	US classification^c	ATC
ATC	0.53 (0.45-0.60)	NA	0.77 (0.71-0.82)	NA
Cochrane review	0.60 (0.48-0.73)	0.58 (0.46-0.71)	0.74 (0.62-0.82)	0.71 (0.58-0.80)

Abbreviations: ATC, Anatomical Therapeutic Classification; NA, not applicable.

^{^a}

Linear weighting was used.

^{^b}

Consolidated (4-category scale).

^{^c}

Reverse-coded (7-category scale).