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Articles by Y Zhong
Total Records ( 2 ) for Y Zhong
  E. L Hannan , Y Zhong , M Racz , A. K Jacobs , G Walford , K Cozzens , D. R Holmes , R. H Jones , M Hibberd , D Doran , D Whalen and S. B. King

Background— The benefit of primary percutaneous coronary interventions (P-PCI) for patients with ST-elevation myocardial infarction (STEMI) has been well documented. However, controversy still exists as to whether PCI should be expanded to hospitals without coronary artery bypass graft surgery.

Methods and Results— Patients who were discharged after PCI for STEMI between January 1, 2003, and December 12, 2006, in P-PCI centers (hospitals with no coronary artery bypass graft surgery, and PCI only for patients with STEMI) were propensity matched with patients in full service centers, and mortality and subsequent revascularization rates were compared. For patients undergoing PCI, there were no differences for in-hospital/30-day mortality (2.3% for P-PCI centers versus 1.9% for full service centers [P=0.40]), emergency coronary artery bypass graft surgery immediately after PCI (0.06% versus 0.35%, P=0.06), 3-year mortality (7.1% versus 5.9%, P=0.07), or 3-year subsequent revascularization (23.8% versus 21.5%, P=0.52). P-PCI centers had a lower same/next day coronary artery bypass graft rate (0.23% versus 0.69%, P=0.046) and higher repeat target vessel PCI rates (12.1% versus 9.0%, P=0.003). For patients with STEMI who did not undergo PCI, P-PCI centers had higher in-hospital mortality (28.5% versus 22.3%; adjusted odds ratio, 1.38; 95% CI, 1.10 to 1.75).

Conclusions— No differences between P-PCI centers and full service centers were found in in-hospital/30-day mortality, the need for emergency surgery, 3-year mortality or subsequent revascularization, but P-PCI centers had higher repeat target vessel PCI rates and higher mortality rates for patients who did not undergo PCI. P-PCI centers should be monitored closely, including the monitoring of patients with STEMI who did not undergo PCI.

  Y Zhong , Y Huang , T Zhang , C Ma , S Zhang , W Fan , H Chen , J Qian and D. Lu

O6-methylguanine-DNA methyltransferase is one of the rare proteins to directly remove alkylating agents in the human DNA direct reversal repair pathway. Its two common single-nucleotide polymorphisms, Leu84Phe and Ile143Val, had previously been identified to contribute to susceptibility of cancer. However, there are conflicting results in studies on the association of the two polymorphisms with cancer. Therefore, we conducted a meta-analysis to clarify the paradox with a large collected sample (13 069 cancer patients and 20 290 controls). We found significant association between the T allele (84Phe) and cancer risk, under the recessive genetic model [P = 0.023, odds ratio (OR) = 1.251, 95% confidence interval (CI) 1.031–1.517, Pheterogeneity = 0.270], TT versus CC comparison (P = 0.035, OR = 1.239, 95% CI 1.015–1.511, Pheterogeneity = 0.225) and TT versus CT comparison (P = 0.007, OR = 1.292, 95% CI 1.071–1.559, Pheterogeneity = 0.374), using the random-effect model. In the ethnicity subgroup analysis, a significant association with cancer among Caucasians was found under the recessive genetic model, homozygote comparison and TT versus TC comparison. In the tumour sites subgroup analysis, only the protective effects of Leu84Phe polymorphism were found in colorectal cancer, under CT versus CC comparison. No significant association between the G allele of Ile143Val and cancer risk was found. The G allele showed an increased lung cancer risk under the dominant genetic model and AG versus AA comparison in all Hardy–Weinberg equilibrium subjects, only when the fixed-effect model was used. However, it was insignificant in the random-effect model.

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