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Table 2 Mean numbers of patients with seizures on particular days in vicinity of days with a particular upper level weather type, synoptic situation, or biometeorological forecast

From: Weather patterns and occurrence of epileptic seizures

  N Seizure mean two days later Seizure mean one day later Seizure mean Seizure mean one day before
Upper level weather types
 R 235 0.57 ± 0.73 0.57 ± 0.77 0.57 ± 0.77 0.63 ± 0.82
 NG 121 0.58 ± 0.69 0.63 ± 0.82 0.59 ± 0.79 0.58 ± 0.76
 GNW 286 0.63 ± 0.72 0.59 ± 0.76 0.59 ± 0.76 0.49 ± 0.74
 NWS 121 0.62 ± 0.69 0.62 ± 0.66 0.62 ± 0.66 0.55 ± 0.63
 GSW 104 0.61 ± 0.86 0.63 ± 0.80 0.63 ± 0.70 0.61 ± 0.76
 SWS 287 0.64 ± 0.88 0.67 ± 0.89 0.68 ± 0.89 0.68 ± 0.79
 T 96 0.67 ± 0.86 0.47 ± 0.82 0.47 ± 0.72 0.55 ± 0.86
 ULC 108 0.54 ± 0.69 0.63 ± 0.75 0.63 ± 0.76 0.62 ± 0.82
 NS 24 0.54 ± 0.66 0.46 ± 0.66 0.46 ± 0.66 0.63 ± 0.71
 NES 17 0.53 ± 0.51 0.59 ± 0.51 0.59 ± 0.50 0.36 ± 0.79
 SS 39 0.66 ± 0.71 0.49 ± 0.64 0.49 ± 0.64 0.67 ± 0.77
 SES 18 0.33 ± 0.59 0.39 ± 0.69 0.39 ± 0.69 0.67 ± 1.03
 WS 128 0.65 ± 0.82 0.69 ± 0.75 0.69 ± 0.75 0.80 ± 0.85
 ES 15 0.60 ± 0.63 0.67 ± 0.81 0.67 ± 0.81 0.60 ± 0.83
p-value   0.982 0.577 0.720 0.042
Surface synoptic situations
 Low pressure field 279 0.68 ± 0.84 0.63 ± 0.83 0.62 ± 0.76 0.69 ± 0.84
 High pressure field 743 0.58 ± 0.78 0.58 ± 0.79 0.58 ± 0.79 0.54 ± 0.74
 Non-gradient pressure field 457 0.61 ± 0.76 0.69 ± 0.78 0.65 ± 0.79 0.64 ± 0.79
 Transition state 121 0.59 ± 0.80 0.56 ± 0.69 0.60 ± 0.71 0.68 ± 0.82
p-value   0.305 0.316 0.501 0.012
Biometeorological forecast
 Favourable 911 0.63 ± 0.79 0.61 ± 0.79 0.59 ± 0.78 0.57 ± 0.78
 Unfavourable 689 0.59 ± 0.78 0.61 ± 0.77 0.62 ± 0.79 0.65 ± 0.79
p-value   0.290 0.993 0.699 0.029
  1. Values, arithmetic means±SD; p-values obtained using Kruskall-Wallis test when > 2 categories, Mann-Whitney U-test when 2 categories; p < 0.05 written in bold letters