Skip to main content

Table 1 Research question based on the PECOS framework

From: Breast cancer risk factors in Iranian women: a systematic review and meta-analysis of matched case–control studies

Population

Iranian women

Exposure

Females with specific risk factors

Comparisons

Females without specific risk factors

Outcome

Incidence of malignant breast cancer in the last year with pathology confirmation

Study design

Matched case–control