Odds ratio and 95% confidence intervals from longitudinal analyses for the period 6–18 months after the intervention for sore eyes, headache and back pain
| OR (95% CI) | |
|---|---|
| *Main effect of intervention measured as odds ratio of having a symptom between the plancha and open fire groups. | |
| †Change of odds over time per 6 months during follow-up for each symptom independent of intervention. | |
| Sore eyes in past month | |
| Plancha/open fire* | 0.18 (0.11 to 0.29) |
| Time† | 0.63 (0.50 to 0.82) |
| Headache in past month | |
| Plancha/open fire* | 0.63 (0.42 to 0.94) |
| Time† | 0.69 (0.55 to 0.85) |
| Back pain in past month | |
| Plancha/open fire* | 0.85 (0.52 to 1.39) |
| Time† | 0.63 (0.49 to 0.81) |