她开始对医院里其他的猪流感患者进行检测，出来的结果证实了她的猜测：病情越重的人，他们的IgG2的水平越低。
She ordered tests for other hospital patients with swine flu and the pattern was confirmed: the sicker they were, the lower their IgG2 levels.
结果患者病情越重，手术创伤愈大，手术时间越长，侵入性操作越多，院内感染率越高。
Result Serious diseases, big operative incisive wounds , long operating duration and more invasive operations made occurrence of cross_infection in the hospital more frequent.
考虑到对照组的患者病情要稍重一些，研究人员对结果进行了校正以排除这一因素的影响。
Although the patients in the control group were in a slightly more serious condition, the researchers took this into account and adjusted the results to rule out this effect.
考虑到对照组的患者病情要稍重一些，研究人员对结果进行了校正以排除这一因素的影响。
Although the patients in the control group were in a slightly more serious condition, the researchers took this into account and adjusted the results to rule out this effect.
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