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目的：本研究旨在了解Ｃ反应蛋白（ＣＲＰ）测定对于老年性肺炎的诊断价值。方法：连续选取２０例白细胞总数不高的老年肺炎患者作为回顾性研究对象。比较其治疗前和治疗７—１０ｄ后肺炎痊愈或明显好转时ＣＲＰ水平，并与体温、白细胞分类结果进行比较。结果：治疗后ＣＲＰ水平（０．５７±０．６８μｇ／ｍｌ）显著低于治疗前水平（５．９０±３．５７μｇ／ｍｌ），Ｐ＜０．００１；治疗前ＣＲＰ的阳性率为１００％，显著高于嗜中性粒细胞比率＞７５％的阳性率（３０％）和体温高于３７．５℃的阳性率（３０％），Ｐ＜０．００５。结论：ＣＲＰ可以作为一项反映细菌感染的敏感指标，有助于不典型老年肺炎的诊断和疗效观察。
Objective: This study was designed to investigate the diagnostic value of C-reactive protein (CRP) for senile pneumonia. Methods: A total of 20 patients with senile pneumonia who did not have a high total leucocyte count were selected as the retrospective study subjects. The levels of CRP before and 7 to 10 days after treatment were compared and the results of body temperature and leukocyte classification were compared. Results: The CRP level (0.57 ± 0.68μg / ml) after treatment was significantly lower than that before treatment (5.90 ± 3.57μg / ml), P <0.001. The positive rate of CRP before treatment was 100% , Significantly higher than the positive rate (30%) of the neutrophil ratio> 75% and the positive rate (30%) of the body temperature higher than 37.5 ° C, P <0.005. Conclusion: CRP can be used as a sensitive indicator of bacterial infection, which can contribute to the diagnosis and treatment of atypical pneumonia in elderly patients.