Is chest tube drainage necessary after subxiphoid thoracoscopic thymectomy?

Table 2 Blood examination of 205 cases

Factors	Total (n = 205)	Group A^a (n = 115)	Group B^a (n = 90)	p
CRP^b (mg/L)
PRD	2.9 ± 7.5	3.5 ± 9.3	2.2 ± 4.3	0.688
1POD	34.6 ± 22.8	38.5 ± 26.2	29.6 ± 16.2	0.020
3POD	15.4 ± 30.5	19.8 ± 39.0	9.8 ± 11.2	0.085
WBC^b (/μL)
PRD	6500 ± 2400	6400 ± 2300	6700 ± 2500	0.427
1POD	11,600 ± 3700	11,700 ± 3900	11,600 ± 3400	0.947
3POD	7900 ± 2700	8000 ± 2800	7800 ± 2500	0.510
CK^b (U/L)
PRD	76.6 ± 55.6	80.0 ± 61.7	72.3 ± 46.6	0.322
1POD	260.5 ± 146.4	255.6 ± 150.4	266.8 ± 141.7	0.591
3POD	60.5 ± 49.8	57.0 ± 51.8	65.1 ± 47.0	0.247
Hgb^b (g/L)
PRD	133 ± 17	134 ± 17	132 ± 18	0.353
1POD	129 ± 16	132 ± 15	125 ± 17	0.005
3POD	129 ± 17	130 ± 16	128 ± 17	0.521

CRP C-reactive protein, CK creatine kinase, Hgb hemoglobin, POD postoperative day, PRD preoperative day, WBC white blood cell count
^aGroup A consists of patients with chest tube drainage; group B consists of patients without chest tube drainage
^bData expressed as mean ± standard deviation

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