The study has systematically investigated the tendency and the effect of atmospheric pollution on resident's health in Lanzhou urban area using comprehensive multi-factorial analysis.
采用多指标多因素的综合评判方法对兰州市城区大气污染的变化规律及其给人群健康带来的影响，进行了系统的分析。
Methods The prognosis of 37 patients with colorectal cancer and synchronous liver metastasis who received simultaneous resection were analyzed by multi-factorial logistic regression analysis.
方法采用多因素回归分析方法回顾性分析3 7例大肠癌伴肝转移患者行同期切除的临床资料；
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