Table 5. Relationship between surgical characteristics, pain level after surgery

Factors	Quality of sleep			p (CI: 95%)
		Good n (%)	Poor n (%)
History of surgery	No	77 (21.5%)	281 (78.5%)	p = 0.35*
	Yes	5 (31.3%)	11 (68.7%)
Types of surgery	Laparoscopic surgery	31 (25.8%)	11 (74.2%)	p = 0.2
	Open surgery	51 (20.1%)	203 (79.9%)
Surgical organ	Upper gastro-intestinal tract	15 (25%)	45 (75%)	p = 0.56*
	Liver and biliary tract	14 (19.4%)	58 (80.6%)
	Colon-rectum	13 (25%)	39 (75%)
	Appendix	24 (26.4%)	67 (73.6%)
	Thoracic	11 (15.5%)	60 (84.5%)
	Pancreas	5 (17.9% )	23 (82.1%)
Level of pain	Mild pain	19 (43.2%)	25 (56.8%)	p < 0.001
	Moderate pain	57 (29.1%)	139 (70.9%)
	Severe pain	6 (4.5%)	128 (95.5%)

Fisher’s exact