Table 6. Accuracy of ophthalmic diagnoses by web site within Internet users, n (%) .
| Visited | Did not visit | p -Value a | Total no. visited | ||
|---|---|---|---|---|---|
| Correct | 16 (43) | 3 (38) | 1.00 | 37 (82) | |
| Incorrect | 7 (19) | 2 (25) | |||
| No prediction | 14 (38) | 3 (38) | |||
| Mayo Clinic | Correct | 8 (89) | 11 (30) | 0.003 | 6 (20) |
| Incorrect | 1 (11) | 9 (24) | |||
| No prediction | 0 (0) | 17 (46) | |||
| WebMD | Correct | 8 (44) | 11 (41) | 0.86 | 18 (40) |
| Incorrect | 4 (22) | 5 (19) | |||
| No prediction | 6 (33) | 11 (41) | |||
| Wikipedia | Correct | 2 (50.0) | 17 (41) | 0.18 | 4 (8) |
| Incorrect | 2 (50.0) | 7 (17) | |||
| No prediction | 0 (0) | 17 (41) | |||
Notes: Web sites visited by less than five participants are not included. “No prediction” indicates participants who did not provide self-diagnoses and instead selected the “I do not know” response.
a
Two-sided p -values with α level 0.05 for Internet users versus nonusers using Fisher's exact tests. Statistics not computed for groups with constant responses. Bolded p -values are significant.