Operative management of acute diverticulitis in immunosuppressed compared to immunocompetent patients: A systematic review

Table 2 Characteristics of the included studies

Ref.	Year	Country	Study design	No. of patients1		Total n	Follow-up period (mo)
				IMS	IMC
Canter et al[9]	1970	United States	Retrospective	11	38	49	NR
Perkins et al[10]	1984	United States	Retrospective	10	31	41	NR
Tyau et al[11]	1991	United States	Retrospective	23	55	78	NR
Hesterberg et al[15]	1994	Germany	Retrospective	12	80	92	NR
Qasabian et al[16]	2004	Australia	Retrospective	8	16	24	Mean 57 (SD NR)
Reshef et al[1]	2012	United States	Case control	51	51	102	NR
Biondo et al[13]	2012	Spain	Prospective	61	254	315	Mean 81.62 ± 67.62 SD
Halabi et al[12]	2013	United States	Retrospective	1249	753517	754766	NR
Golda et al[14]	2014	Spain	Retrospective	53	63	116	NR
Total				1478	754105	755583

¹Number of patients managed operatively. NR: Not reported; SD: Standard deviation; IMS: Immunosuppressed; IMC: Immunocompetent.