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. Author manuscript; available in PMC: 2013 Jul 25.
Published in final edited form as: Pediatr Blood Cancer. 2010 Apr;54(4):552–558. doi: 10.1002/pbc.22327

TABLE V.

Interaction of Chronic Transfusion Therapy and RBC Antibodies

Chronic transfusion therapy
P-value
Current (n = 40) Past (n = 16) Never (n = 17)
RBC antibodies 15 (37.5) 8 (50.0) 7 (41.2) 0.73
HLA antibodies 13 (32.5) 6 (37.5) 6 (35.3) 0.95
Stratified odds ratio 7.88 (1.78–34.8) 0.33 (0.04–2.77) 22.5 (1.6–314.6) 0.013

The numbers (%) of patients in each chronic transfusion category (current, past, never) with RBC antibodies and HLA antibodies are given. The stratified odds ratios (95% confidence interval) reflect the association of RBC antibodies and HLA antibodies within each chronic transfusion category. The P-values for RBC antibodies and HLA antibodies are calculated by Fisher’s exact test. The P-value comparing stratified odds ratios is calculated by Breslow–Day test.