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Table 4 Observational studies with a control group quality assessment checklist

From: Prevention of cervical cancer in HIV-seropositive women from developing countries: a systematic review protocol

Assessment criteria Studies fulfilling criteria Studies not fulfilling criteria Studies not applicable
Assessment of participants’ on admission to study    
Assessment of prevention method under review    
Participants were stratified for the cervical cancer prevention or screening method under review    
Ascertainment of cervical cancer and HIV status, prospectively from participants through diagnosis, laboratory tests and blood tests    
Ascertainment of cervical cancer and HIV status, retrospectively from participants through diagnosis, laboratory tests and blood tests    
Complete follow-up—all subjects accounted for    
Subjects lost to follow up unlikely to introduce bias (≥75% follow-up or description provided of those lost    
If groups were not stratified for prevention and screening methods and the distribution was unbalanced, were outcomes adjusted for