Interventions to Increase Blood Donation among Ethnic/Racial Minorities: A Systematic Review

Table 4

Critical appraisal.

	NHMRC level of evidence	Magnitude of effect	Clearly focused issue	Recruitment acceptable	Exposure accurately measured	Outcome accurately measured	Confounding factors identified	Confounding factors controlled	Follow-up—complete enough	Follow-up—long enough	Total acceptable
Bachegowda et al. [34]	III-2	High	+	+	+	+	?	−	+	+	6/8
Charbonneau and Daigneault [38]; Charbonneau and Tran [39]	III-3	High	+	+	−	?	−	−	?	+	3/8
Frye et al. [40]	III-3	High	+	+	+	+	+	+	+	+	8/8
Grassineau et al. [41]	IV	Med	+	+	−	+	−	−	+	?	4/8
Price et al. [35]	III-2	High	+	+	+	+	+	+	+	+	8/8
Price et al. [42]	III-2	High	+	+	+	+	+	+	+	+	8/8
Robbins et al. [36]	IV	Med	+	+	+	+	+	+	+	−	7/8
Sutton [37]	III-2	High	+	−	+	−	+	−	−	+	4/8

Judgement based only on absolute increases in donor numbers as no statistical comparison was reported.