结果不预防性应用组感染率为3.4%（1/29），预防性应用抗生素组感染率为3.2%（1/31），两组术后感染率无显著差异（P>0.05）。
Results The incidence of postoperative infection was 3.4% (1/29) in NONE group and 3.2% (1/31) in PA group, without significant difference between the two groups (P>0.05).
结果不预防性应用组感染率为3.4%（1/29），预防性应用抗生素组感染率为3.2%（1/31），两组术后感染率无显著差异（P>0.05）。
Results The incidence of postoperative infection was 3.4% (1/29) in NONE group and 3.2% (1/31) in PA group, without significant difference between the two groups (P>0.05).
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