Associations between Ln-transformed maximum ozone concentration and reported symptoms by stepwise logistic regression.

For all models R2a NS—not selected by the stepwise backward variable selectionb The flight-related variables that were included in the final model based on a significance level of p41]). In parentheses the directions of the ORs for the variables (continuous) or their categories (categorical) are indicated when significant at pAssociations between Ln-transformed maximum ozone concentration and reported symptoms by stepwise logistic regression.

针对所有模型，R2a无统计学意义（未通过逐步向后变量选择法（stepwise backward variable selection）b筛选）。
基于显著性水平p41]（疑似输入疏漏，应为p<0.05）入选最终模型的飞行相关变量。
当连续型变量或其分类变量在p<0.05水平下具有统计学意义时，将比值比（Odds Ratio，OR）的方向标注于括号内。经逐步逻辑回归（stepwise logistic regression）分析，自然对数转换（Ln-transformed）后的最大臭氧浓度与受试者报告的症状之间的关联。