To analyze the difference and variation rule of the parameters of venous blood cells in the pilot candidates from different areas, and provide a reference for the revision of physical examination standard and physical evaluation.

The candidates were divided into seven groups: East China, South China, Central China, North China, Northwest China, Southwest China, and Northeast China, according to the areas they came from, and 224 candidates were randomly selected from each group. 2 ml morning fasting venous blood was collected into a dipotassium ethylene tetraacetate anticoagulation tube. As the sample was mixed homogenously, parameters of blood cells were determined by Beckman Coulter system 2 Automated Hematology Analyzer and the results were shown in the form of mean ± standard deviation (±s). The statistical analysis was performed by using one-way analysis of variance (ANOVA), and it took P<0.05 as the statistical significance of difference.

Comparing the blood cell parameters of the candidates from different areas, WBC, neutrophilic granulocyte, lymphocyte, and monocyte showed no statistical significance (P>0.05); eosinophilic granulocyte and basophilic granulocyte showed statistical significance (F=7.906, 2.524, P<0.01); all parameters of red blood cell and platelet showed statistical significance (F=4.435-14.864, F=4.847-20.657, P<0.01). The percentage of abnormality was respectively 18.11% in RBC, 43.56% in Hb, 14.16% in hemoglobin, 17.54% in lymphocyte, 9.06% in neutrophilic granulocyte, and 1.40% in platelet.

There are regional differences in venous blood cell parameters among the pilot candidates from different areas. It is necessary to improve the items of blood cell test and the evaluation standard considering the area difference in order to obtain more accurate physical evaluation and the references for the tracking survey of the blood cell parameters in pilots.

Blood cell count; Hemoglobinometry; Hematocrit; Physical examination; Personnel selection