按新生儿体重
Per neonatal weight
以上为机器翻译结果，长、整句建议使用 人工翻译 。
方法：对298例病理状态下新生儿，按病情严重程度、孕周、出生体重、胎龄与体重的关系的不同进行分组。
Methods: 298 cases of newborns with abnormal status were grouped according to the illness severity, birth weight, the weeks of pregnant and the relationship between gestational age and birth weight.
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