Screening for sickle cell disease in newborns: a systematic review

Table 3 Risk of bias in the study included (King et al. [26])

Study	Both treatment groups studied in parallel (yes/no)	Comparability of groups or adequate control for confounding factors	Blinding patient/investigator	Selective reporting improbable	Absence of other factors potentially causing bias	Risk of bias (study level)
King et al. [26]	No	Unclear^a	No/no	Yes	Yes	High

^aNo control for potential confounding factors. No baseline data available. Comparability of groups in terms of baseline characteristics seems likely, as newborns of the same region were included in both groups

ISSN: 2046-4053