Table 1. Characteristics of studies of comorbidity and ovarian cancer survival.

First author, (reference), year, country	Age (Year)	No. of Cases	Study period	CCI assessment	Survival rate (%)	Adjusted factors
						Age	Stage	Grade	Histology	Treatment	Ascites	Residual tumor
Anuradha et al.13, 2014, Australia						≥18	1192	2005–2012	√	7-year (31%)	√	√	√	√	—	√	—
Erickson et al.6, 2014, USA	N/A					367	2004–2009	√	N/A	√	√	√	—	—	—	√
Sperling et al.7, 2013, Denmark	All	3129				2005–2011	√	Overall (46.5%)	√	√	—	√	—	—	√
Tetsche et al.8, 2008, Denmark	>15	5213	1995–2003			√	Overall (32.4%)	√	√	—	—	—	—	—
Du bois et al.9, 2005, Germany	All	476	2001–2003	—		Overall (69.1%)	√	√	√	√	—	√	—
Mass et al.11, 2005, Netherlands	All	1116	1995–2004	√	Overall (42%)	√	√	—	—	√	—	—
O’Malley et al.10, 2003, USA	All	1051	1994–2001	√	Overall (36.1%)	√	√	√	√	√	—	—
DiSilvestro et al.12, 1997, USA	All	137	1987–1992	√	4-year (51%)	√	√	—	—	—	—	—

CCI, Charlson’s comorbidity index; N/A, not available.