| | | AMI | HF | Stroke |
| | Number of studies | 8 [17–24] | 11 [25–35] | 7 [36–42] |
| | Publication years | 1997 [22]–2008 [17, 20] | 1997 [25]–2009 [35] | 1995 [38]–2009 [42] |
| | Journal type | Cardiac [20, 22, 24], nephrology [19], general medicine [21], nursing [23], psychology [17], and geriatric [18] | Cardiac [25, 29–32, 34, 35], psychology [26, 33], general medicine [27], and geriatric [28]. | Neurology/stroke [36, 39–42], cardiology [37], and psychology [38] |
| | Author discipline | Medicine [18, 19, 21, 24], medicine plus another discipline [17, 20, 22], or nursing [23] | Medicine [25–27, 29–32, 34, 35], medicine plus another discipline [33], or nursing [28] | Medicine [36–42] |
| | Country of study | USA except one [22] | USA | USA |
| | Study question related to comorbidity | 3 [17, 19, 21] | 4 [25, 26, 31, 33] | 3 [36, 38, 40] |
| | Used a comorbidity instrument | CCI [17] | CCI [25], Duke Severity of Illness Checklist [26], Geriatric Depression Scale [26], and Beck Depression Inventory [31, 33] | Hamilton Depression Rating Scale [36] |
| | Main outcomes | Mortality [18, 19, 21, 22], morbidity [20, 21, 23, 24], and disability [17] | Mortality [25, 27, 31], disability [26, 28, 33], QoL [28], and health service utilization [25, 28–30, 32, 34] | Morbidity [38–40, 42], QoL [37, 38], and health service utilization [41] |
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