| 1. | Analysis of hospital data by statistical methods for observational studies
观察性研究方法与医院资料的统计分析 |
| 2. | Most importantly , observational studies cannot distinguish indicators of risk from causal factors
最为重要的是观察性研究无法区分风险指标和偶然因素。 |
| 3. | Conclusions : selenium concentrations were inversely associated with coronary heart disease risk in observational studies
结论：观察性研究中硒浓度与冠心病危险度呈负相关。 |
| 4. | There are multiple possible reasons for discrepant results between observational studies and large randomized trials
导致观察性研究和大规模随机临床试验结果之间不一致的可能原因有多种。 |
| 5. | Because observational studies have provided misleading evidence for other antioxidants , the validity of this association is uncertain
由于观察性研究为其他的抗氧化物提供了误导性证据，所以这种联系的可靠性还不明确。 |
| 6. | The researchers note that this is an observational study that “ cannot conclude that [ inhaled corticosteroids ] reduce lung cancer " and that the results need confirmation
研究人员说，这是一项观察性研究，不能得出“吸入糖皮质激素可以减少肺癌” ，这些结果需要证实。 |
| 7. | Since 1990 , 2 randomized trials and seeral obserational studies hae ealuated the benefits s risks of expectant management of seere preeclampsia at < 34 weeks of gestation
自1990年以来， 2个随机实验和一些观察性研究评价了对于妊娠小于34周的重度先兆子痫采用保守治疗的利与弊。 |
| 8. | Since 1990 , 2 randomized trials and several observational studies have evaluated the benefits vs risks of expectant management of severe preeclampsia at < 34 weeks of gestation
自1990年以来， 2个随机试验和一些观察性研究评价了对于妊娠小于34周的重度先兆子痫采用保守治疗的利与弊。 |
| 9. | Preoperatie mechanical bowel preparation before colorectal surgery is a widely - practised treatment , but its efficacy has neer been proen outside obserational studies and animal experiments
结直肠手术术前机械性肠道准备是一个广泛使用的常规处理，但除了观察性研究和动物实验，其效用并未被证实。 |
| 10. | Our observational study suggests that it might help distinguish colonized grade 1 from infected grade 2 wounds , predict ulcer outcome and contribute to a more adequate use of antibiotics
我们的观察性研究提示这种方法有助于将移居的1级和感染的2级伤口相鉴别，预测溃疡的结局和促进更充分的抗生素的运用。 |
