Table 4.

Systematic Review of the Literature

Author	Patients	Representation of Data	Intensity of Shoulder Pain after Laparoscopy (PLSP)
	N	Mean (SD)	Arrival	2 h	4 h	6 h	8 h	Discharge	Day 0	Day 1	Day 2	Day 3
Korell25
Total	89
Cold gas	45					3.2 (2.6)				3.6a (2.4)	2.7 (2.1)	1.8 (1.9)
Warm gas	44					3.2a (2.6)				2.5 (2.6)	1.7 (2.3)	1 (1.6)
Suginami26
Total	40
Group I	19								—	PM-b	—	—
Group II	21								—	—	AM-b	—
Madsen27
Total	99
Group 8-deep	49		—	—	—		—b	—		—	—	—
Group 12-Mod	50		—	—	—		—b	—		—	—	—
Goldberg28
Total	51
CO2 group	29		—					—		—b	—	—
Gasless group	22		—					—		—b	—	—

^aThe patient's shoulder pain reached its peak.

^bUnable to determine the exact value from the original text.