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. 2023 Jan 19;18(2):59–67. doi: 10.1097/COH.0000000000000778

Table 1.

Summary of study characteristics

Study characteristic No. of studies (n = 22) %
Study setting
 Community 12 54.5
 Secondary/tertiary care 7 31.8
 Hospital 3 13.6
Data source
 Electronic health records 17 77.3
 Self-reported 3 13.6
 Self-reported/health records 1 4.5
 Administrative data 1 4.5
Study population
 All adults (aged ≥18 years) 18 81.8
 Middle-aged and older adults (aged ≥45 years) 3 13.6
 Older adults (≥65 years) 1 4.5
Study purpose
 Association of risk factors with multimorbidity 13 59.1
 Patterns or clusters of MM 6 27.3
 Prevalence or burden of multimorbidity (without examining associations with risk factors or outcomes) 2 9.1
 Association of multimorbidity with outcome 1 4.5
Definition for multimorbidity
 ≥1 2 9.1
 ≥2 16 72.7
 ≥3 1 4.5
 Not stated 3 13.6
Type of multimorbidity measure
 Simple count 14 63.6
 Weighted index 1 4.5
 Simple count & weighted index 1 4.5
 Statistical approach 6 27.3
Number of conditions included in measure
 1–10 12 54.5
 11–20 6 27.3
 21–30 3 13.6
 31–40 0 0.0
 41–50 0 0.0
 >50 1 4.5
How were conditions considered
 Individual 7 31.8
 Grouped & individual 15 68.2
Condition selection criteria stated
 Yes 10 45.5
 No 12 54.5
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