Comparison of the Ability To Identify Particles by Visual Examination Using the Two Different Light Sources (95% Confidence Interval), (LR = Likelihood Ratio)
| Validity Parameter | Focused Desk Lamp | Laser Light Pointer |
|---|---|---|
| Sensitivity | 0.76 (0.71–0.81) | 0.79 (0.75–0.84) |
| Specificity | 0.74 (0.63–0.83) | 0.61 (0.50–0.72) |
| LR+ | 2.9 (2.0–4.2) | 2.1 (1.6–2.7) |
| LR− | 0.3 (0.3–0.4) | 0.3 (0.3–0.4) |