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Table 4 The preoperative variables are listed and evaluated by P and F values through SPSS 17.0 toolkit

From: Predicting postoperative complications of head and neck squamous cell carcinoma in elderly patients using random forest algorithm model

Variable

Postoperative complication group

Non-postoperative complication group

T-value

P-value

Preoperative heart rate (beats/min)

75.25 ± 10.42

76.55 ± 12.13

1.298

0.132

Preoperative systolic pressure (mmHg)

149.14 ± 22.62

146.38 ± 23.36

1.358

0.843

Preoperative white blood cell count (×109/L)

6.04 ± 1.86

6.46 ± 2.14

2.289

0.043

Preoperative hemoglobin (g/L)

127.00 ± 15.44

128.03 ± 16.93

0.713

0.712

Preoperative serum sodium (mmol/L)

143.17 ± 8.106

135.20 ± 6.00

1.136

0.095

Preoperative blood potassium (mmol/L)

3.30 ± 0.57

3.34 ± 0.62

0.628

0.410

Preoperative blood sugar (mmol/L)

5.13 ± 1.01

5.23 ± 1.10

0.942

0.957

Preoperative blood urea (g/L)

5.01 ± 1.53

5.52 ± 8.78

0.888

0.044

  1. The two variables that were finally selected are highlighted