Short-Term Relationship between Hip Fracture and Weather Conditions in Two Spanish Health Areas with Different Climates
Table 4
Association between meteorological variables and occurrence of hip fracture: results of the case-crossover analysis.
Lag
Mediterranean area
Inland area
Average temperature
0
0.993 (0.975–1.011)
0.997 (0.980–1.013)
1
0.990 (0.971–1.008)
0.999 (0.982–1.015)
Average relative humidity
0
1.002 (0.997–1.008)
0.999 (0.991–1.007)
1
0.997 (0.992–1.003)
0.994 (0.986–1.003)
Rain (yes versus no)
0
1.000 (0.999–1.001)
1.000 (0.999–1.002)
1
0.874 (0.736–1.036)
0.915 (0.812–1.030)
Dew (yes versus no)
0
0.996 (0.869–1.141)
1.008 (0.859–1.184)
1
1.019 (0.889–1.167)
1.083 (0.924–1.269)
Frost (yes versus no)
0
0.853 (0.550–1.321)
0.965 (0.780–1.165)
1
0.997 (0.667–1.490)
1.009 (0.817–1.248)
Fog (yes versus no)
0
0.885 (0.509–1.537)
0.980 (0.812–1.183)
1
1.080 (0.662–1.762)
0.966 (0.79–1.171)
Storm (yes versus no)
0
1.215 (0.855–1.727)
1.084 (0.872–1.348)
1
1.376 (0.957–1.979)
1.054 (0.843–1.317)
Frequency of less windy periods
0
1.000 (0.999–1.001)
nd
1
0.997 (0.995–0.999)
nd
Wind velocity
0
1.002 (0.996–1.007)
1.001 (0.988–1.015)
1
1.006 (0.999–1.013)
1.001 (0.987–1.015)
Results expressed as odds ratio (confidence interval 95%). Lag: association with meteorological conditions on the same day () or the day before () hospital admission. Average temperature (OR by increase of 1°C); relative humidity (OR by increase of 1%); less windy periods (OR by increase in a tenth of an hour of periods of calm); wind velocity (OR by increase in 1 km/h); nd: not determined.
