Table 2.
Profile of the sample
| Diabetes | Asthma | Heart Failure | Hypertension | Full Sample | ||
| (n=24) | (n=8) | (n=17) | (n=13) | (n=62) | ||
| Year of publication | ||||||
| Prior to 1991 | - | - | - | 1 | 1 (2%) | |
| 1991-1995 | 4 | - | - | - | 4 (6%) | |
| 1996-2000 | 3 | 1 | 2 | 3 | 9 (15%) | |
| 2001-2004 | 12 | 4 | 7 | 5 | 28 (45%) | |
| 2005-2008 | 5 | 3 | 8 | 4 | 20 (32%) | |
| Where the study was conducted | ||||||
| United States | 11 | 3 | 8 | 6 | 28 (45%) | |
| Europe | 10 | 2 | 6 | 3 | 21 (34%) | |
| Asia | 2 | 1 | - | 1 | 4 (6%) | |
| Canada | 1 | - | 2 | 1 | 4 (6%) | |
| Elsewhere | - | 2 | 1 | 2 | 5 (8%) | |
| Type of publication | ||||||
| Journal article | 24 | 8 | 16 | 13 | 61 (98%) | |
| Proceeding | - | - | 1 | - | 1 (2%) | |
| Research design | ||||||
| Large RCT | 2 | 1 | 5 | 3 | 11 (18%) | |
| Small RCT | 19 | 5 | 8 | 2 | 34 (55%) | |
| Nonrandomized study | 3 | 2 | 4 | 8 | 17 (27%) | |