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The relation between the occurrence of cold spells and the risk of SCD based on stratified analyses by season
| Season | OR (95% CI) |
| Autumn | 2.51 (1.27 to 4.96) |
| Winter | 1.70 (1.13 to 2.55) |
| Spring | 0.89 (0.45 to 1.79) |
| Summer | 0.42 (0.15 to 1.18) |
SCD, sudden cardiac death.
