The distribution of pulmonary lobe involvement in different clinical types is shown in Table 2. All 5 lobes were involved in the severe-critical type while the lower lobes were usually involved in the common type (40/46, 87.0%). Compared with the severe-critical type, the common type had a lower incidence of right upper lobe and middle lobe involvement (p = 0.016; p = 0.006, respectively), and also a lower incidence of right lower lobe, left lower lobe, and left upper lobe involvement; however, there was no significant difference between severe-critical type and common type (p = 0.635; p = 0.635; p = 0.239; respectively). Table 2 Comparison of affected lobe distribution and clinical classification Frequency of lobe involvement Total (78) Light type (24) Common type (46) Severe-critical type (8) Statistic p value* Right upper lobe 32 (41.0%) 0 (0%) 24 (52.2%) 8 (100%) – 0.016a Right middle lobe 30 (38.5%) 0 (0%) 22 (47.8%) 8 (100%) – 0.006a Right lower lobe 48 (61.5%) 0 (0%) 40 (87.0%) 8 (100%) 0.225 0.635b Left upper lobe 42 (53.8%) 0 (0%) 34 (73.9%) 8 (100%) 1.386 0.239b Left lower lobe 48 (61.5%) 0 (0%) 40 (87.0%) 8 (100%) 0.225 0.635b *p value: common type vs severe-critical type aFisher exact test bContinuity correction