Table 2.

Quality assessment: percent of papers^a,b

	Mean number of patients in study samplec	Ingredient approach used for provider costs	Resource use and unit costs clearly described	Year of cost data reported	Main cost categories clearly separated	Descriptive statistics presented	Patient interviews	Methods for valuing productivity loss clearly explained	Sources for productivity losses assumptions justified
Papers with provider costs only (n = 28)
HIC (n = 15)	307	73	60	80	73	20	NA	NA	NA
UMIC (n = 11)	384	100	73	91	82	9	NA	NA	NA
LMIC (n = 1)	1797	0	0	0	100	0	NA	NA	NA
LIC (n = 1)	300	100	0	100	0	0	NA	NA	NA
Papers with patient costs included (n = 62)
HIC (n = 10)	475	89	82	82	82	45	18	82	64
UMIC (n = 18)	305	91	78	61	83	22	94	61	56
LMIC (n = 16)	345	63	94	88	81	50	94	69	50
LIC (n = 18)	154	73	78	78	89	33	100	56	44
All papers	324	81	76	77	80	30	83	65	52

HIC high-income countries, LIC low-income country, LMIC lower-middle income country, NA not applicable, UMIC upper-middle income countries

^aThese results are shown for each study in the Electronic Supplementary Material (Online Resources 2 and 3)

^bData are presented as % unless otherwise indicated

^cAmong the studies with patient-level data