Table 1 Description of the 5 LASA measurement waves conducted between 2015 and 2019
|  | Wave 2015–16 | Wave 75PLUS I | Wave 75PLUS II | Wave 75PLUS III | Wave 2018–19 |
|---|---|---|---|---|---|
Invited | 686 | 686 | 601 | 550 | 473 |
Participated, n (%) | 601 | 601 (87.6) | 550 (91.5) | 507 (92.2) | 473 |
Age, mean (SD) | 82.2 (5.4) | 83.0 (5.4) | 83.4 (5.2) | 83.8 (4.9) | 84.1 (4.8) |
Female, n % | 368 (61.2) | 368 (61.2) | 338 (61.5) | 311 (61.3) | 295 (62.4) |
Functional limitations, mean (SD) | 23.9 (6.3) | 22.7 (6.9) | 23.1 (6.3) | 22.3 (6.4) | 22.4 (6.5) |
Cognitive functioning, mean (SD) | 14.3 (1.9) | 14.6 (1.7) | 14.6 (1.8) | 14.6 (1.8) | 14.2 (2.1) |
Face-to-face interview, n | 453 (78.0) | 442 (73.5) | 410 (68.2) | 364 (66.2) | 326 (68.9) |
Telephone interview proxy | 53 (8.8) | 61 (10.1) | 55 (10) | 59 (11.6) | 50 (10.3) |
Telephone interview respondent | 86 (14.3) | 98 (16.3) | 85 (15.5) | 84 (16.6) | 93 (17.0) |