Laboratory efficacy outcomes in treatment groups
Parameter/ treatment group* . | Baseline . | Change† . | Adjusted mean difference between senicapoc and placebo . | ||
---|---|---|---|---|---|
Mean‡ . | 95% CI§ . | P‖ . | |||
Hemoglobin level, g/L | |||||
10 mg | 79.7 | 6.8 | 6.3 | (2.8 to 9.8) | <.001 |
6 mg | 82.9 | 2.8 | 2.6 | (−1.0 to 6.2) | .148 |
Placebo | 82.9 | 0.1 | — | — | — |
Hematocrit level, % | |||||
10 mg | 24.65 | 2.00 | 1.89 | (0.71 to 2.89) | .002 |
6 mg | 25.38 | 1.11 | 0.99 | (−0.13 to 2.10) | .082 |
Placebo | 25.41 | 0.11 | — | — | — |
Red blood cell count, ×1012/L | |||||
10 mg | 2.56 | 0.30 | 0.31 | (0.17 to 0.43) | <.001 |
6 mg | 2.63 | 0.14 | 0.14 | (0.01 to 0.27) | .03 |
Placebo | 2.60 | −0.01 | — | — | — |
Reticulocyte count, % | |||||
10 mg | 13.79 | −4.12 | −4.14 | (−6.05 to −0.22) | <.001 |
6 mg | 13.88 | −2.81 | −2.76 | (−4.72 to −0.80) | .006 |
Placebo | 15.15 | −0.46 | — | — | — |
Absolute reticulocyte count, ×109/L | |||||
10 mg | 340 | −80 | −70 | (−120 to −30) | .001 |
6 mg | 350 | −50 | −50 | (−90 to −2) | .041 |
Placebo | 390 | −20 | — | — | — |
Mean corpuscular volume, fL | |||||
10 mg | 97.50 | −2.02 | −2.74 | (−4.48 to −0.99) | .002 |
6 mg | 97.04 | −0.47 | −1.16 | (−2.95 to 0.63) | .203 |
Placebo | 98.48 | 0.78 | — | — | — |
Mean corpuscular hemoglobin level, pg | |||||
10 mg | 31.89 | −0.83 | −1.04 | (−1.68 to −0.40) | .002 |
6 mg | 31.79 | −0.51 | −0.72 | (−1.38 to −0.07) | .031 |
Placebo | 32.17 | 0.23 | — | — | — |
Mean corpuscular hemoglobin concentration, g/L | |||||
10 mg | 326.7 | −1.7 | −1.1 | (−6.0 to 3.9) | .665 |
6 mg | 327.4 | −3.7 | −3.1 | (−8.0 to 2.1) | .248 |
Placebo | 326.9 | −0.6 | — | — | — |
Dense red blood cells, % cells with hemoglobin level more than 410 g/L | |||||
10 mg | 7.29 | −2.41 | −2.32 | (−3.62 to −1.02) | <.001 |
6 mg | 8.30 | −2.01 | −1.69 | (−3.03 to −0.35) | .014 |
Placebo | 7.28 | −0.08 | — | — | — |
Absolute dense red blood cell count, ×1012/L | |||||
10 mg | 0.18 | −0.04 | −0.04 | (−0.07 to −0.01) | .008 |
6 mg | 0.21 | −0.04 | −0.03 | (−0.06 to −0.003) | .033 |
Placebo | 0.18 | 0.00 | |||
Indirect bilirubin level,¶ μmol/L | |||||
10 mg | 50.27 | −20.18 | −25.31 | (−34.20 to −16.42) | <.001 |
6 mg | 59.16 | −17.78 | −21.38 | (−30.26 to −12.48) | <.001 |
Placebo | 68.40 | 2.05 | — | — | — |
Lactate dehydrogenase, U/L | |||||
10 mg | 509 | −121 | −90.3 | (−145.6 to −35.1) | .002 |
6 mg | 544 | −108 | −67.1 | (−124.3 to −9.8) | .022 |
Placebo | 462 | −15 | — | — | — |
Parameter/ treatment group* . | Baseline . | Change† . | Adjusted mean difference between senicapoc and placebo . | ||
---|---|---|---|---|---|
Mean‡ . | 95% CI§ . | P‖ . | |||
Hemoglobin level, g/L | |||||
10 mg | 79.7 | 6.8 | 6.3 | (2.8 to 9.8) | <.001 |
6 mg | 82.9 | 2.8 | 2.6 | (−1.0 to 6.2) | .148 |
Placebo | 82.9 | 0.1 | — | — | — |
Hematocrit level, % | |||||
10 mg | 24.65 | 2.00 | 1.89 | (0.71 to 2.89) | .002 |
6 mg | 25.38 | 1.11 | 0.99 | (−0.13 to 2.10) | .082 |
Placebo | 25.41 | 0.11 | — | — | — |
Red blood cell count, ×1012/L | |||||
10 mg | 2.56 | 0.30 | 0.31 | (0.17 to 0.43) | <.001 |
6 mg | 2.63 | 0.14 | 0.14 | (0.01 to 0.27) | .03 |
Placebo | 2.60 | −0.01 | — | — | — |
Reticulocyte count, % | |||||
10 mg | 13.79 | −4.12 | −4.14 | (−6.05 to −0.22) | <.001 |
6 mg | 13.88 | −2.81 | −2.76 | (−4.72 to −0.80) | .006 |
Placebo | 15.15 | −0.46 | — | — | — |
Absolute reticulocyte count, ×109/L | |||||
10 mg | 340 | −80 | −70 | (−120 to −30) | .001 |
6 mg | 350 | −50 | −50 | (−90 to −2) | .041 |
Placebo | 390 | −20 | — | — | — |
Mean corpuscular volume, fL | |||||
10 mg | 97.50 | −2.02 | −2.74 | (−4.48 to −0.99) | .002 |
6 mg | 97.04 | −0.47 | −1.16 | (−2.95 to 0.63) | .203 |
Placebo | 98.48 | 0.78 | — | — | — |
Mean corpuscular hemoglobin level, pg | |||||
10 mg | 31.89 | −0.83 | −1.04 | (−1.68 to −0.40) | .002 |
6 mg | 31.79 | −0.51 | −0.72 | (−1.38 to −0.07) | .031 |
Placebo | 32.17 | 0.23 | — | — | — |
Mean corpuscular hemoglobin concentration, g/L | |||||
10 mg | 326.7 | −1.7 | −1.1 | (−6.0 to 3.9) | .665 |
6 mg | 327.4 | −3.7 | −3.1 | (−8.0 to 2.1) | .248 |
Placebo | 326.9 | −0.6 | — | — | — |
Dense red blood cells, % cells with hemoglobin level more than 410 g/L | |||||
10 mg | 7.29 | −2.41 | −2.32 | (−3.62 to −1.02) | <.001 |
6 mg | 8.30 | −2.01 | −1.69 | (−3.03 to −0.35) | .014 |
Placebo | 7.28 | −0.08 | — | — | — |
Absolute dense red blood cell count, ×1012/L | |||||
10 mg | 0.18 | −0.04 | −0.04 | (−0.07 to −0.01) | .008 |
6 mg | 0.21 | −0.04 | −0.03 | (−0.06 to −0.003) | .033 |
Placebo | 0.18 | 0.00 | |||
Indirect bilirubin level,¶ μmol/L | |||||
10 mg | 50.27 | −20.18 | −25.31 | (−34.20 to −16.42) | <.001 |
6 mg | 59.16 | −17.78 | −21.38 | (−30.26 to −12.48) | <.001 |
Placebo | 68.40 | 2.05 | — | — | — |
Lactate dehydrogenase, U/L | |||||
10 mg | 509 | −121 | −90.3 | (−145.6 to −35.1) | .002 |
6 mg | 544 | −108 | −67.1 | (−124.3 to −9.8) | .022 |
Placebo | 462 | −15 | — | — | — |
— indicates not applicable.
10 mg indicates 10 mg senicapoc; 6 mg, 6 mg senicapoc.
From baseline (average of the screening and day 1 [predose] values) to study end point (average of week 10 and week 12, or the last, nonmissing, postbaseline values collected through week 12 or study medication discontinuation).
Least square mean difference between senicapoc and placebo, controlling for hydroxyurea therapy and baseline level of the assay.
95% confidence interval for the mean difference between senicapoc and placebo, controlling for hydroxyurea therapy and baseline level of the assay.
Pairwise comparison of change from baseline between each senicapoc and placebo dose, based on an ANCOVA model with baseline and hydroxyurea therapy as covariates.
Total bilirubin was also statistically significantly decreased.