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Number of basic and health usability problems according to severity category.
| Factor type | Usability problems (n=400), n (%) | Severity category, n (%) | ||
|
|
|
Minor (n=186) | Serious (n=147) | Critical (n=67) |
| Basic | 278 (69.5) | 130 (69.9) | 101 (68.7) | 47 (70.1) |
| Health | 122 (30.5) | 56 (30.1) | 46 (31.3) | 20 (29.9) |
