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Percentage of people engaging in Web use for symptom appraisal reported by included studies (n=4).
| Reference | Study population | Sample size | Reported Web use for symptom appraisal, % (95% CI) |
| Fox & Duggan [1] | Adults living in the US | 3014 | 35% (33%-37%) |
| White & Horvitz [42] | US Microsoft employees | 515 | 75% (71%-79%) |
| Medlock et al [31] | Members of a senior church organization, Netherlands | 118 | 23% (15%-31%) |
| Thomson et al [41] | Colorectal cancer patients, US | 242 | 25% (20%-31%) |
