如何解释泊松回归中的系数?
我如何解释泊松回归中的主要影响(虚拟编码因子的系数)? 假设以下示例: treatment <- factor(rep(c(1, 2), c(43, 41)), levels = c(1, 2), labels = c("placebo", "treated")) improved <- factor(rep(c(1, 2, 3, 1, 2, 3), c(29, 7, 7, 13, 7, 21)), levels = c(1, 2, 3), labels = c("none", "some", "marked")) numberofdrugs <- rpois(84, 10) + 1 healthvalue <- rpois(84, 5) …