Table 3 Comparison of the number of affected lung lobes with clinical classification Number of lobes affected Total (78) Light type (24) Common type (46) Severe-critical type (8) Statistic p value* 0 24 (100%) 24 (100) 0 (0) 0 (0%) – – 1 8 (10.3%) 0 8 (17.4%) 0 (0%) 0.546 0.460b 2 6 (7.7%) 0 6 (13.0%) 0 (0%) 0.225 0.635b 3 5 (6.4%) 0 5 (10.9%) 0 (0%) – 1.000a 4 10 (12.8%) 0 10 (21.7%) 0 (0%) 0.937 0.333b 5 25 (32.1%) 0 17 (37.0%) 8 (100%) – 0.001a More than two lung lobes 40 (51.3%) 0 32 (70.0%) 8 (100%) 1.893 0.169b Bilateral lungs 45 (57.7%) 0 37 (80.4%) 8 (100%) 0.734 0.392b *p value: common type vs severe-critical type aFisher exact test bContinuity correction