Table 5
Logistic regression models for prediction of visual acuity (VA) at follow up
| Variable | Comprehensive model | Parsimonious model* | ||
|---|---|---|---|---|
| OR (95% CI) for VA<20/60 | OR (95% CI) for VA<20/400 | OR (95% CI) for VA<20/60 | OR (95% CI) for VA<20/400 | |
| *Determined using forward, backward, and stepwise regression methods with inclusion criteria of p<0.05, fixing age and sex into the model. | ||||
| †Severe injury (n = 355) was defined as deep (>1/3 corneal thickness) foreign body, corneal ulcer, corneal rupture, corneal blood stain, cataract, dislocated lens, iridodialysis, iris prolapse, “other” iris damage, scleral rupture, hyphaema, macula/retinal damage. | ||||
| Values in bold if confidence intervals do not contain 1.0. | ||||
| “Paramedical” includes care sought at local pharmacy, local medicine shops or clinics with medical or paramedical workers, health posts, and non-eye care hospitals. | ||||
| Demographics | ||||
| Age (years) | 1.04 (1.02 to 1.07) | 1.03 (1.00 to 1.06) | 1.05 (1.02 to 1.07) | 1.03 (1.00 to 1.06) |
| Sex | 1.05 (0.50 to 2.19) | 0.54 (0.18 to 1.64) | 1.10 (0.54 to 2.22) | 0.59 (0.19 to 1.65) |
| Literacy | 0.20 (0.08 to 0.49) | 0.05 (0.01 to 0.41) | 0.20 (0.08 to 0.48) | 0.05 (0.01 to 0.42) |
| Place of treatment first sought: (compared to Hariaun clinic) | ||||
| Self/neighbour/shaman | 0.90 (0.25 to 3.26) | 0.57 (0.06 to 6.60) | ||
| Paramedical | 2.47 (1.17 to 5.20) | 3.75 (1.19 to 11.8) | 2.39 (1.21 to 4.73) | 4.15 (1.42 to 12.10) |
| Time to treatment first sought: (compared to day 1) | ||||
| 1st week | 1.11 (0.47 to 2.61) | 1.28 (0.36 to 4.53) | ||
| More than 1 week | 1.34 (0.38 to 4.67) | 1.14 (0.17 to 7.72) | ||
| Clinical presentation (severe compared to mild) | ||||
| Severe injury† | 1.89 (0.81 to 4.43) | 8.26 (1.04 to 65.43) | 8.04 (1.02 to 63.42) | |
