Table 2.

Results of quality assessment of studies on mortality or sequelae after bacterial meningitis.

Study	Study participation	Study attrition	Measurement of prognostic factors	Measurement of outcomes	Statistical analysis and presentation	Quality score (points)	Quality: + = high +/- = moderate - = low
Koomen et al., 2004 [5]	15	12.5	10	12.5	12.5	62.5	+
Lovera et al., 2005 [33]	13.5	7.5	12.5	10	12.5	56	+/-
Roine et al., 2008 [35]	15	10	7.5	7.5	15	55	+/-
Oostenbrink et al., 2002 [21]	15	7.5	10	10	12.5	55	+/-
Pelkonen et al., 2009 [6]	12	10	12.5	7.5	12.5	54.5	+/-
Forsyth et al., 2004 [18]	10.5	10	7.5	15	10	53	+/-
Biesheuvel et al., 2006 [24]	12	7.5	10	10	12.5	52	+/-
Pagliano et al., 2007 [19]	12	5	12.5	10	12.5	52	+/-
Koomen et al., 2003 [7]	15	7.5	10	7.5	10	50	+/-
Woolley et al., 1999 [9]	12	5	7.5	12.5	12.5	49.5	+/-
Klinger et al., 2000 [31]	13.5	7.5	7.5	10	10	48.5	+/-
Singhi et al., 2007 [15]	13.5	5	5	12.5	12.5	48.5	+/-
Kornelisse et al., 1995 [8]	10.5	5	10	10	12.5	48	+/-
Fakhir et al., 1992 [27]	12	7.5	7.5	12.5	7.5	47	+/-
Akpede et al., 1999 [16]	10.5	7.5	10	10	7.5	45.5	+/-
Kaaresen et al., 1995 [29]	13.5	7.5	7.5	5	10	43.5	-
Kutz et al., 2006 [14]	13.5	5	7.5	7.5	10	43.5	-
Pikis et al., 1996 [20]	13.5	7.5	7.5	7.5	7.5	43.5	-
Pomeroy et al., 1990 [34]	15	5	5	10	7.5	42.5	-
Wasier et al., 2005 [37]	10.5	5	7.5	7.5	10	40.5	-
Grimwood et al., 1996 [12]	7.5	5	7.5	12.5	7.5	40	-
Edwards et al., 1985 [17]	10.5	7.5	7.5	10	2.5	38	-
Letson et al., 1992 [32]	10.5	5	5	10	7.5	38	-
Chao et al., 2008 [26]	12	2.5	5	7.5	5	32	-
Johnson et al. 2007 [28]	12	2.5	5	7.5	5	32	-
Bortolussi et al., 1978 [25]	10.5	5	2.5	7.5	5	30.5	-
Antilla et al., 1994 [22]	7.5	2.5	7.5	7.5	2.5	27.5	-
Kirimi et al., 2003 [30]	7.5	5	7.5	2.5	5	27.5	-
Valmari et al., 1987 [36]	4.5	2.5	5	5	7.5	24.5	-
Herson et al., 1977 [13]	4.5	2.5	5	2.5	5	19.5	-
Bhat et al., 1987 [23]	4.5	2.5	2.5	2.5	5	17	-