Hazard ratios and their associated 95% confidence intervals (CI).

Confidence intervals not overlapping 1 indicate an effect of that covariate. Land cover types and seasons are categorical variables where hazard ratios are in reference to the base category. The base landcover category is grassland, and the base season is fall.

当置信区间（confidence interval）未与1重叠时，表明该协变量（covariate）存在效应。土地覆盖类型（land cover types）与季节均为分类变量（categorical variable），其风险比（hazard ratio）以基准类别为参照。基准土地覆盖类别为草地（grassland），基准季节为秋季（fall）。