Table 3 Value of signs and symptoms for differentiating "sight threatening" from "non-sight threatening" eye conditions
Right eyes | |||||||
|---|---|---|---|---|---|---|---|
Sign or symptom | ST | NST | Total | Sensitivity | Specificity | PPV | NPV |
*poor distance *good distance Total | 287 266 553 | 120 622 742 | 407 888 1295 | 51.9 | 83.8 | 70.5 | 70.0 |
*poor near vision *good near vision Total | 284 266 550 | 167 571 738 | 451 837 1288 | 51.6 | 77.4 | 63.0 | 68.2 |
VA<6/18 VA≥ 6/18 Total | 305 248 553 | 668 63 731 | 973 311 1284 | 55.1 | 8.6 | 31.3 | 20.3 |
pain no pain Total | 246 307 553 | 243 496 739 | 489 803 1292 | 44.5 | 67.1 | 50.3 | 61.8 |
discharge no discharge Total | 95 455 550 | 95 641 736 | 190 1096 1286 | 17.3 | 87.1 | 50.0 | 58.5 |
itching no itching Total | 165 386 551 | 326 411 737 | 491 797 1288 | 29.9 | 55.8 | 33.6 | 51.6 |
not straight straight Total | 77 468 545 | 48 691 739 | 125 1159 1284 | 14.1 | 93.5 | 61.6 | 59.6 |
lid closure abnormal lid closure normal Total | 33 517 550 | 8 729 737 | 41 1246 1287 | 6.0 | 98.9 | 80.5 | 58.5 |
eye red eye not red Total | 191 358 549 | 154 583 737 | 345 941 1286 | 34.8 | 79.1 | 55.4 | 62.0 |
pupil not black pupil black Total | 110 437 547 | 3 734 737 | 113 1171 1284 | 20.1 | 99.6 | 97.3 | 62.7 |