The primary outcome was death from any cause for the comparison between the combination regimen and placebo; the frequency of exacerbations, health status, and spirometric values were also assessed. 所记录的原始结果包括由比较联合给药组和安慰剂组所得各种原因引起的死亡,以及对恶化的频率、健康状况和肺活量检查数值。
A spirometric lung test was performed at the first isit, and lung function was measured on each subsequent isit. 第一次就诊时进行肺活量检测,在后续每次就诊时检测肺功能。