Table 3. Cluster centers of 1402 digital health apps, with cluster size percentage (%) out of 1402.
| Variables | Median (IQR) | Cluster medoids | |||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Apps with poor user ratings | Apps with poor PCAa and DPb scores | Apps with poor PCA scores | Higher quality apps with higher user ratings | ||
| User ratings | 4.49 (0.707) | 3.23 | 4.58 | 4.47 | 4.60 |
| PCA score | 49 (45.3) | 57.0 | 35.1 | 31.9 | 73.0 |
| UXc score | 75.2 (9.42) | 72.9 | 71.6 | 71.6 | 80.3 |
| DP score | 65.3 (18.3) | 61.3 | 42.4 | 67.5 | 66.4 |
| ORCHAd score, median (IQR) | —e | 63 (21) | 46 (12) | 54 (9) | 74 (10) |
| Cluster size, n (%) | — | 220 (15.7) | 252 (18) | 415 (29.6) | 515 (36.7) |
a
PCA: professional and clinical assurance.
b
DP: data privacy.
c
UX: user experience.
d
ORCHA: Organisation for the Review of Care and Health Applications.
e
Not applicable.