Table 1.

Age group, number of conditions considered and data sources used to define and measure multimorbidity in LMICs.

Age group in years	Authors	Number of conditions considered	Authors
All ages	47,58	3–6	28,33,43,55,56,58–62,68,77,85,93	Data sources used	Authors
≥13	64	8–12	25–27,30–32,36,38,41,44,57,63,67, 71,73–76,78–80,83,86,91,95–99	Data primary collected for multimorbidity studies	28,30,32–34,36–40,42,43,45,47, 48,51,59–61,63,65,66,71,72,74, 90,92,93,100
≥15	34,54,56,62	13–20	29,35,37,40,42,45,48,49,51–53,64–66,72,81,82,84,86,88,90,94
				Survey data from electronic records World health survey data	77–80,97
≥18	27,30,31,33,37,39,41, 43,53,60,61,63, 65–69,71,72,77–80, 86,88,91–93,96–100	21–40	34,39,46,47,50,54,89,92,100	Global aging and adult health (SAGE survey) data	25,26,55,67,68,95,96,99
18–64	42			Other national data sources	27,29,35,41,44,46,49,52,53,56,  57,62,70,75,76,81–84,86,94,98
≥20	38,44,82			Medical records	31,50,58,60,64,73,88,89,91
24–69	35
≥40	25,26,55,59,81,87
40–75	75,76
≥45	49,50
≥50	95
≥60	28,29,32,40,46,48,51, 52,57,70,73,74,83–85,90
60–79	36
≥65	89,94
≥80	45