Summary of the demographic and baseline characteristics of the 2 treatment groups
| Variable . | Treatment group . | Overall . | |
|---|---|---|---|
| Standard dose . | Low dose . | ||
| Sex, no. (%) | |||
| Male | 40 (65.6) | 37 (63.8) | 77 (64.7) |
| Female | 21 (34.4) | 21 (36.2) | 42 (35.3) |
| Overall no. | 61 | 58 | 119 |
| Ethnic origin, no. (%) | |||
| White | 56 (91.8) | 55 (94.8) | 111 (93.3) |
| African American or black | 1 (1.6) | 0 (0.0) | 1 (0.8) |
| American Indian/Alaska native | 1 (1.6) | 0 (0.0) | 1 (0.8) |
| Asian | 1 (1.6) | 0 (0.0) | 1 (0.8) |
| Other | 2 (3.3) | 3 (5.2) | 5 (4.2) |
| Overall no. | 61 | 58 | 119 |
| Previous transfusion, proportion (%) | |||
| Platelets | 33/61 (54.1) | 35/56 (62.5) | 68/117 (58.1) |
| Red cells | 45/60 (75.0) | 46/56 (82.1) | 91/116 (78.4) |
| Previous pregnancies, proportion (%) | |||
| Yes | 17/61 (27.9) | 15/57 (26.3) | 32/118 (27.1) |
| Blood group, no. (%) | |||
| O | 22 (36.1) | 18 (31.0) | 40 (33.6) |
| A | 35 (57.4) | 28 (48.3) | 63 (52.9) |
| B | 4 (6.6) | 9 (15.5) | 13 (10.9) |
| AB | 0 (0.0) | 3 (5.2) | 3 (2.5) |
| Overall no. | 61 | 58 | 119 |
| Rh type, no. (%) | |||
| Positive | 47 (77.0) | 48 (82.8) | 95 (79.8) |
| Negative | 14 (23.0) | 10 (17.2) | 24 (20.2) |
| Overall no. | 61 | 56 | 119 |
| Mean height, cm (SD) | 169 (10) | 171 (9) | 170 (10) |
| Mean weight, kg (SD) | 75.2 (15.6) | 78.7 (14.0) | 76.9 (14.9) |
| Mean baseline platelet count, ×109/L (SD) | 46 (62) | 31 (26) | 38 (48) |
| Variable . | Treatment group . | Overall . | |
|---|---|---|---|
| Standard dose . | Low dose . | ||
| Sex, no. (%) | |||
| Male | 40 (65.6) | 37 (63.8) | 77 (64.7) |
| Female | 21 (34.4) | 21 (36.2) | 42 (35.3) |
| Overall no. | 61 | 58 | 119 |
| Ethnic origin, no. (%) | |||
| White | 56 (91.8) | 55 (94.8) | 111 (93.3) |
| African American or black | 1 (1.6) | 0 (0.0) | 1 (0.8) |
| American Indian/Alaska native | 1 (1.6) | 0 (0.0) | 1 (0.8) |
| Asian | 1 (1.6) | 0 (0.0) | 1 (0.8) |
| Other | 2 (3.3) | 3 (5.2) | 5 (4.2) |
| Overall no. | 61 | 58 | 119 |
| Previous transfusion, proportion (%) | |||
| Platelets | 33/61 (54.1) | 35/56 (62.5) | 68/117 (58.1) |
| Red cells | 45/60 (75.0) | 46/56 (82.1) | 91/116 (78.4) |
| Previous pregnancies, proportion (%) | |||
| Yes | 17/61 (27.9) | 15/57 (26.3) | 32/118 (27.1) |
| Blood group, no. (%) | |||
| O | 22 (36.1) | 18 (31.0) | 40 (33.6) |
| A | 35 (57.4) | 28 (48.3) | 63 (52.9) |
| B | 4 (6.6) | 9 (15.5) | 13 (10.9) |
| AB | 0 (0.0) | 3 (5.2) | 3 (2.5) |
| Overall no. | 61 | 58 | 119 |
| Rh type, no. (%) | |||
| Positive | 47 (77.0) | 48 (82.8) | 95 (79.8) |
| Negative | 14 (23.0) | 10 (17.2) | 24 (20.2) |
| Overall no. | 61 | 56 | 119 |
| Mean height, cm (SD) | 169 (10) | 171 (9) | 170 (10) |
| Mean weight, kg (SD) | 75.2 (15.6) | 78.7 (14.0) | 76.9 (14.9) |
| Mean baseline platelet count, ×109/L (SD) | 46 (62) | 31 (26) | 38 (48) |