Birgitta Versluijs

71 HRCT after hematopoietic cell transplantation TABLE 4. Prevalence of imaging findings in patients with respiratory symptoms early after hematopoietic cell transplantation. Finding Total (N = 52) Allo-LS (N = 18) Nonallo-LS (N=34) Difference P a Bronchiectasis 13 (25) 7 (39) 6 (17) NS Airway wall thickening 14 (27) 6 (33) 8 (24) NS Tree-in-bud pattern 6 (12) 3 (17) 3 (9) NS Nodules 20 (38) 9 (50) 11 (32) NS Consolidation 37 (71) 13 (72) 24 (70) NS Ground-glass pattern 34 (67) 15 (83) 19 (56) 0.04 Septa thickening 13 (25) 5 (28) 8 (24) NS Airtrapping 25 (48) 11 (61) 14 (41) NS Note—Data are number of patients with percentage in parentheses. Allo-LS = alloimmu- ne-mediated lung syndromes, Nonallo-LS = non-alloimmune-mediated lung syndromes, NS = not significant. a Fisher exact test. TABLE 5. High-resolution CT scores for alloimmune- (Allo-LS) and non-alloimmune mediated lung syndromes (Nonallo-LS) early after hematopoietic cell transplantation Finding Allo-LS Nonallo-LS P a Bronchiectasis 0 (0-12.5) 0 (0-0) 0.063 Airway wall thickening 0 (0-15.2) 0 (0-1.4) 0.382 Tree-in-bud pattern 0 (0-0) 0 (0-0) 0.499 Nodules 2.7 (0-16.7) 0 (0-6.9) 0.210 Consolidation 11.1 (0-33.3) 5.6 (0-16.7) 0.399 Ground-glass pattern 25 (9.7-51.4) 5.6 (0-16.7) 0.017 Septa thickening 0 (0-9.7) 0 (0-1.4) 0.704 Airtrapping 13.9 (0-45.8) 0 (0-11.1) 0.039 Composite score (total of 8) 12.1 (9.7-18.9) 6.6 (1.4-10.4) 0.000 "Allo-score" (ground-glass pattern + airtrapping) 29.2 (19.4-33.3) 6.9 (0-16.7) 0.000 Note—Data are medians with 25–75% quartiles in parentheses. Statistically significant p values are in bold. a Mann-Whitney U test. 4