Table 3. Accuracy of ophthalmic diagnoses, n (%) .
| Responses | Internet users | Nonusers | p -Value a | All | |
|---|---|---|---|---|---|
| All cases | Correct | 9 (41) | 13 (13) | <0.001 | 32 (22) |
| Incorrect | 10 (22) | 12 (12) | 22 (15) | ||
| No prediction | 17 (37) | 73 (75) | 90 (63) | ||
| Total no. | 46 | 98 | – | 144 | |
| Excluding cases with known trauma | Correct | 17 (40) | 6 (8) | <0.001 | 23 (19) |
| Incorrect | 9 (20) | 10 (13) | 19 (16) | ||
| No prediction | 17 (40) | 63 (79) | 80 (65) | ||
| Total no. | 43 | 79 | – | 122 | |
| Cases of high acuity b | Correct | 10 (42) | 8 (17) | 0.03 | 18 (25) |
| Incorrect | 5 (21) | 6 (13) | 11 (15) | ||
| No prediction | 9 (38) | 33 (70) | 42 (59) | ||
| Total no. | 24 | 47 | – | 71 | |
| Cases of low acuity c | Correct | 9 (41) | 5 (10) | 0.001 | 14 (19) |
| Incorrect | 5 (23) | 6 (12) | 11 (15) | ||
| No prediction | 8 (36) | 40 (78) | 48 (66) | ||
| Total no. | 22 | 51 | – | 73 |
Note: “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. Bolded p -values are significant. Pearson's chi-square tests were used for accuracy based on all cases and all cases excluding those with known trauma. Fisher's exact tests were used for accuracy based on cases of high and low acuities.
b
A diagnosis of high acuity signifies the need for emergent or urgent evaluation (e.g., corneal ulcers, uveitis, retinal detachments).
c
A diagnosis of low acuity signifies the lack of need for emergent or urgent evaluation (e.g., refractive error, dry eye, chalazia, hordeola).