RO：相对赔率

“Relative Odds”（相对赔率）在书写和使用中常缩写为“RO”，以提升效率。这一术语在医学领域，尤其是英国医学文献中较为常见，常用于表示两种结果发生概率的相对比值。

And the consumer price index ( CPI ) Evaluation of reference including energy consumption over the previous year, chain, fixed base relative, and the cumulative odds is introduced to ethylene analysis and evaluation of energy efficiency, the more indicators.
并把消费者物价指数（CPI）评价方法引用到乙烯能效的分析评价中，比较指标包括能耗同比、环比、定基比、累积比。
Methods A method based on epidemiological theory and Bayes ' theorem was established to measure the contribution of individual risk factor, using the relative risk ( RR ) or odds ratio ( OR ) value obtained from population-based cohort studies or meta-analysis.
方法运用贝叶斯公式，依据相关流行病学理论，建立由相对危险度数值等来测算单个危险因素对个体发病贡献权重的方法。
Conclusion : Premature delivery, breech presentation,ⅲ° meconium-stained amniotic fluid, low birth weight and pregnancy induced hypertension are all highly relative to neonatal asphyxia. Most of them with the odds ratios bigger than 4, are the strong risk factors of neonatal asphyxia.
结论：羊水Ⅲ°污染、早产、低体重儿、妊高征、臀位与新生儿窒息高度相关，以上多个因素新生儿窒息的发生比率大于4，是新生儿窒息的危险因素；

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