Table 3.
Assessments of the successive versions of a web-based decision aid by mixed samples of older adults and health care professionals and impact of the decision aid on the perception of older adults of the clarity of their values and of being well-informed before (pre) and after (post) using the decision aid.
| Outcome | Version 1 (n=6 HCPa) | Version 2 (n=3 OAb and 1 HCP) | Version 3 (n=3 OA) | Version 4 (n=2 OA) | Version 5 (n=3 OA) | Version 6 (n=1 OA) | Total (n=12 OA and 7 HCP) |
| Willingness to use the decision aid—postc, mean (SD) | 3 (1) | 4 (0) | N/Ad | N/A | N/A | N/A | N/A |
| System usability scale—poste, mean (SD) | 56 (23) | 65 (20) | 77 (10) | 56 (16) | 75 (16) | 55 (0) | N/A |
| Acceptability—postf, mean (SD) | 76 (9) | 84 (6) | 92 (8) | 82 (9) | 86 (4) | 73 (0) | N/A |
| Satisfaction—postg, mean (SD) | 4 (1) | 4 (1) | 5 (0) | 3 (1) | 4 (1) | 5 (0) | N/A |
| Values clarity (DCSh)—prei, mean (SD) | N/A | 64 (43) | 64 (10) | 38 (41) | 75 (17) | 50 (0) | 61 (27) |
| Values clarity (DCS)—posti, mean (SD) | N/A | 83 (8) | 83 (14) | 63 (30) | 92 (8) | 92 (0) | 83 (16) |
| Pre-post mean values clarity (DCS) score increase | N/A | 19 | 19 | 25 | 17 | 42 | 22 |
| Informed (DCS)—prej, mean (SD) | N/A | 61 (54) | 61 (24) | 54 (30) | 72 (27) | 67 (0) | 63 (30) |
| Informed (DCS)—postj, mean (SD) | N/A | 69 (10) | 92 (8) | 79 (6) | 92 (14) | 67 (0) | 82 (14) |
| Pre-post mean informed (DCS) score increase | N/A | 8 | 31 | 25 | 20 | 0 | 19 |
aHCP: health care practitioner.
bOA: older adult.
cScale from 1 to 5, with 5 indicating higher willingness. Answered only by HCP.
dN/A: not applicable, certain measures were used only with HCP or OA.
eScale from 0 to 100, with 100 indicating higher usability. Answered by both OA and HCP.
fProportion of people who find the web-based decision aid acceptable. Answered by both OA and HCP.
gScale from 1 to 5, with 5 indicating higher satisfaction. Answered by both OA and HCP.
hDCS: decisional conflict scale.
iScale ranging from 0 to 100, with 100 indicating higher clarity. Answered only by OA.
jScale ranging from 0 to 100, with 100 indicating. Answered only by OA.