Research Article
Factors Associated with the Differences in Migraine Prevalence Rates between Spanish Regions
Table 3
Association analysis of the differences in migraine prevalence by a series of environmental and ecological factors defining regions.
| | | P value | (95% CI) | Mean (95% CI) |
| Air pollutants | | | | | Carbon monoxide | | 0.47 | −0.21 (−1.86–1.44) | 0.81 (0.16–4.21) | Carbon dioxide | | 0.15 | −1.66 (−4.11–0.79) | 0.19 (0.02–2.20) | Nitrogen oxides | | 0.53 | −0.72 (−3.46–2.02) | 0.49 (0.03–7.58) | Sulphur oxides | | 0.20 | −1.03 (−2.47–0.41) | 0.36 (0.08–1.50) | Weather conditions | | | | | Days registering below 0°C | | 0.01 | −0.01 (−0.01–0.00) | 0.99 (0.99–1.00) | Days registering over 25°C | 0.12 | 0.63 | 0.00 (0.00–0.00) | 1.00 (1.00–1.00) | Clear days | | 0.34 | 0.00 (−0.01–0.00) | 1.00 (0.99–1.00) | Cloudy days | 0.15 | 0.58 | 0.00 (0.00–0.01) | 1.00 (1.00–1.01) | Total rainfall (mm) | 0.03 | 0.91 | 0.00 (0.00–0.00) | 1.00 (1.00–1.00) | Maximum absolute | 0.13 | 0.63 | 0.01 (−0.04–0.06) | 1.01 (0.96–1.06) | Minimum absolute | 0.63 | 0.01 | 0.03 (0.01–0.06) | 1.04 (1.01–1.06) | Altitude | | <0.01 | −0.06 (−1.00–−0.02) | 0.94 (0.91–0.98) | Ecological data | | | | | Inadequate indoor lighting | 0.05 | 0.84 | 0.38 (−3.34–4.10) | 1.46 (0.04–60.64) | Outdoor noises | 0.18 | 0.49 | 0.94 (−1.52–3.41) | 2.57 (0.22–30.33) | Neighbourhood disturbances | 0.15 | 0.56 | 0.87 (−1.09–2.84) | 2.40 (0.34–17.06) | Neighbourhood pollution | 0.25 | 0.34 | 1.24 (−1.50–3.98) | 3.45 (0.22–53.57) |
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