Table 2.
Brief summary of the characteristics of studies included in the systematic literature review
| Variables | Number of patients (%) | |
|---|---|---|
| Intervention (n = 7000) | Control (n = 6595) | |
| Age (mean years ± standard deviation) | 79.385 ± 7.4 | 79.325 ± 6.7 |
| Gender | ||
| Male | 3203 (44.24) | 3044 (40.76) |
| Female | 3797 (55.77) | 3551 (56.38) |
| Country | ||
| USA | 5158 (73.68) | 4710 (71.41) |
| Sweden | 268 (3.82) | 300 (4.54) |
| Norway | 508 (7.25) | 508 (7.70) |
| France | 317 (4.52) | 348 (5.27) |
| Netherlands | 337 (4.81) | 337 (5.10) |
| Canada | 178 (2.54) | 210 (3.18) |
| Germany | 186 (2.65) | 129 (1.95) |
| Italy | 48 (0.68) | 53 (0.80) |