. 2020 Apr 18;20:86. doi: 10.1186/s12871-020-01003-z

Table 4.

Cross-tabulation for a prediction model for maximum postoperative pain according to peripheral venous cannulation-induced pain score

	Venous cannulation-induced pain score (VAS units)		Total number of patients
	< 2.0	≥ 2.0	Total number of patients
Patients reporting maximum postoperative pain intensity at rest (VAS units)
< 4	56 (87.5%)	28 (66.7%)	84
≥ 4	8 (12.5%)	14 (33.3%)	22
Total number of patients	64	42	106

Comparison of the number of patients experiencing pain exceeding VAS 4.0 within 24 h between high response group and low response group (P = 0.01)