Table 3.

PPU studies reporting on 30-day mortality

Study (reference)	Country	Study period	Number of patients	Mortality rate, n (%)	Age, mean	Score system used
Arici et al [50]	Italy	1991-2004	147	14%	52 (median)	Boey
Arveen et al [36]	India	2006-2008	328	9%	43	ASA
Bae et al [7]	Korea	2006-2007	4258	3%	74% younger than 60 years of age	No score system
Bas et al [51]	Belgium	1998-2004	97	5%	39	No score system
Bin-Taleb et al [52]	Yemen	1997-2006	156	4%	39	No score system
Chalya et al [56]	Tanzania	2006-2011	84	11%	28 (median)	No score system
Christensen et al [2]	Denmark	1991-2003	2061	25%	61% older than 65 years of age	No score system
Dakubo et al [35]	Ghana	1998-2002	326	11%	41	No score system
Egberts et al [27]	Germany	1993-2005	261	24%	67 (median)	Possum-phys
Forsmo et al [46]	Norway	1992-2003	102	22%	71 (median)	ASA
Hemmer et al [43]	The Netherlands	2000-2005	272	16%	62	ASA
Kamani et al [57]	Iran	1996-2005	56	5%	50	No score system
Kim et al [49]	Korea	2005-2010	142	6%	57	ASA
Koc et al [16]	Turkey	2005-2006	75	11%	44 (median)	APACHE II, APACHE III SAPS II, MPM II
Kocer et al [47]	Turkey	2001-2004	269	9%	43	ASA
Kujath [48]	Germany	1996-2000	102	14%	69	ASA
Larkin et al [45]	Ireland	1998-2007	76	20%	60	ASA
Lohsiriwat et al [10]	Thailand	2001-2006	152	9%	52	Boey, ASA, MPI
Makele et al [23]	Finland	1979-2000	280	14%	58	Boey, ASA, MPI
Mishra et al [18]	India	1999-2001	140	11%	39	Apache II
						MPI
						Jabalpur
Montalvo-Jave et al [53]	Mexico	2006-2008	30	17%	57	No score system
Muslu et al [58]	Turkey	1998-2005	126	4%	51	No score system
Møller et al [19]	Denmark	2003-2009	2668	27%	71 (median)	PULP, ASA, Boey
Nasio/Saidi [59]	Kenya	2005-2006	44	9%	35	No score system
Noguiera et al [44]	Portugal	1990-2000	210	10%	53 (median)	No score system
Rajesh et al [55]	India	2006-2011	180	13%	<50 years	Apache II
						Boey
Subedi et al [54]	Nepal	2002-2004	145	7%	46	No score system
Taha et al [32]	Scotland	1997-2006	270	19%	64 (median)	Charlson comorbidity index
Thorsen et al [4]	Norway	2003-2009	114	16%	67 (median)	ASA
						Boey

Table sorted alphabetically by study author’s name.

Mortality rates and age are rounded up/down.

American society of anesthesiologists (ASA) score.

Acute physiology and chronic health evaluation II (APACHE II).

Simplified acute physiology score II (SAPS II).

Mortality probability models II (MPM II).

Mannheim peritonitis index (MPI).

Peptic ulcer perforation (PULP) score.

Physiological and operative severity score for the enumeration of mortality and morbidity physical sub-score (POSSUM-phys score).