Table 2.
App demographics for apps with a primary category of either Medicine or Health & Fitness and German-language store descriptions (N=8767) as well as for the manually validated (N=41) apps.
| App demographic | All apps with German-language store descriptions and primary category Medicine or Health & Fitness (N=8768), median (IQR) | Manually validated apps (N=41), median (IQR) | U valuea | P value |
| Overall age (months) | 30.74 (33.21) | 28.14 (32.84) | N/Ab | N/A |
| Time since last update (months) | 9.48 (20.68) | 3.62 (12.92) | 237,440 | <.001 |
| Size (MB) | 28.08 (37.57) | 30.29 (46.22) | N/A | N/A |
| Price (€; paid apps only) | 2.29 (2.5)c for n=1706 paid apps | 3 paid apps (5.99, 43.99, and 69.99) | N/A | N/A |
| Length of description (characters) | 922 (1419.5) | 2352 (1610) | 84,360 | <.001 |
| Average rating (current version; stars) | 4.5 (2) for n=2841 rated apps | 4 (1.75) for n=26 rated apps | N/A | N/A |
| Average rating (all versions; stars) | 4 (2) for n=3287 rated apps | 4 (1) for n=27 rated apps | N/A | N/A |
aWilcoxon rank sum test where applicable.
bN/A: not applicable. Differences between both groups were descriptively too small to warrant testing.
cPrice range: €0.49 to €499.99.