['This study is aimed at exploring the correlation between serum adiponectin (ADPN) levels and leukemia.', 'Eligible studies were retrieved using both computerized and manual searches. Relevant case-control studies were enrolled in strict accordance to our inclusion and exclusion criteria.', 'We searched 130 published studies and included 11 eligible studies for our meta-analysis according to our rigorous inclusion and exclusion criteria. The selected studies included 637 leukemia patients and 524 healthy controls. Our meta-analysis showed: (1) Serum ADPN levels of patients with leukemia were lower than healthy controls; (2) a subgroup analysis based on sample size verified that serum ADPN levels in patients with leukemia were significantly lower than that in healthy controls irrespective of a large sample size (n ≥ 80) or a small sample size (n < 80).'] Are serum adiponectin levels inversely correlated with leukemia : A meta-analysis?