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 1

Comparison of surgery type across study cohorts by means of a chi-square test.

	ControlIV-PCA		TestOral-PCoA		All		value (chi-square)
	N	%	N	%	N	%
Surgery intervention							0.084
Gynecology-hysterectomy	27	44.3	27	61.4	54	51.4
Orthopedics	34	55.7	17	38.6	51	48.6
Hip endoprosthesis/hip surgery	16	47.1	4	23.5	20	39.2
Osteosynthesis/extremity surgery	18	52.9	13	76.5	31	60.8