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选择124名接触低浓度一氧化碳的作业工人（车间空气中一氧化碳浓度范围15．21～51．60mg／m3）和174名不接触一氧化碳的工人（空气一氧化碳浓度范围0．95～3．28mg／m3），分别作为接触和对照组进行健康状况调查。结果表明：接触组与对照组血中碳氧血红蛋白含量排除吸烟因素后，两组间差异具有统计学意义（P＜0．01）；接触组自觉症状阳性检出率明显高于对照组（P＜0．01）；心电图表明接触组窦性心动过缓，心率不齐，S－T段下移及总异常率高于对照组；植物血凝素（PHA）皮试的阳性率也低于对照组，差异具有统计学意义（P＜0．05）；体液免疫指标IgA、IgM、lgG与对照组相比差异具有统计学意义（P＜0．001）。
124 workers exposed to low concentrations of carbon monoxide (15.21-51.60 mg / m3 of carbon monoxide in the air of the workshop) and 174 workers without exposure to carbon monoxide (0.95-3.88 mg / m3 of air carbon monoxide) , Respectively, as a contact and control group for health survey. The results showed that there was a significant difference between the two groups (P <0.01), and the positive rate of the symptoms in the contact group was significantly higher than that in the control group (P <0.01). ECG showed sinus bradycardia, irregular heart rate, S-T segment down and total abnormal rate in the contact group were higher than those in the control group. The positive rate of PHA skin test was also lower than The difference was statistically significant (P <0.05). The humoral immune indicators IgA, IgM, lgG were significantly different from the control group (P <0.001).