A systematic review of the measurement properties of self-care scales in nurses

BMC Nursing

Table 3 COSMIN methodology for assessing the content validity of self-care scales in nurses

Studies (Scale)	PROM development ¹	Content validity ²	Relevance ³				Comprehensiveness ³				Comprehensibility ³				Content validity rating
Studies (Scale)	PROM development ¹	Content validity ²	PROM development study	Content validity study	Rating of reviewers	Overall rating ⁴& QoE ⁵	PROM development study	Content validity study	Rating of reviewers	Overall rating ⁴& QoE ⁵	PROM development study	Content validity study	Rating of reviewers	Overall rating ⁴& QoE ⁵	Overall rating ⁴& QoE ⁵
Galiana et al. [30] (PSC)	Inadequate	Doubtful	±	?	+	Low (±)	-	?	+	Low (±)	+	?	+	Moderate (+)	Low (±)
Yang et al. [33] (MSC)	Inadequate	Doubtful	±	±	+	Low (±)	+	-	+	Low (±)	+	+	+	Moderate (+)	Low (±)

¹Quality of the PROM development (Rating: very good, adequate, doubtful, inadequate); ²Quality of content validity studies on the PROM (Rating: very good, adequate, doubtful, inadequate); ³Result of the single studies against the criteria for good content validity (Rating: sufficient (+), insufficient (–), or indeterminate (?); ⁴Overall rating of result (Rating: sufficient (+), insufficient (–), inconsistent (±), or indeterminate (?)); ⁵quality of the evidence, using a modified GRADE approach (high, moderate, low, very low)

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