Patient-Controlled Analgesia (PCA): Intravenous Administration (IV-PCA) versus Oral Administration (Oral-PCA) by Using a Novel Device (PCoA® Acute) for Hospitalized Patients with Acute Postoperative Pain—A Comparative Retrospective Study

Table 3

Cross-cohort comparison of baseline categorical variables by chi-square for independent samples.

	ControlIV-PCA		TestOral-PCoA		All		value (chi-square)
	N	%	N	%	N	%
Gender							0.638
Female	52	85.2	36	81.8	88	83.8
Male	9	14.8	8	18.2	17	16.2
Employment status							0.024
Employed	28	45.9	30	68.2	58	55.2
Unemployed	33	54.1	14	31.8	47	44.8