Figure 1From: Women receive more trials of noninvasive ventilation for acute respiratory failure than men: a nationwide population-based studyFlow diagram of the study patients. The same excluded patient may appear in different categories. F, female; HFOV, high frequency oscillatory ventilation; LHID, the Longitudinal Health Insurance Database of 2005; M, male; MV, mechanical ventilation; NHI, National Health Insurance.Back to article page