Cox Regression Analysis of Time to Event Data
Event . | Intent to Treat . | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
. | GVHD Prophylaxis . | Relative Risk . | Actual Treatment . | . | . | ||||||||||
. | (no. of events) . | Estimate . | 95% CI . | P Value . | GVHD Prophylaxis . | Relative Risk . | . | . | . | . | . | ||||
. | CSP . | CSP + MP . | . | . | . | (no. of events) . | Estimate . | 95% CI . | P Value . | . | . | . | . | . | |
. | (n = 60) . | (n = 62) . | . | . | . | CSP . | CSP + MP . | . | . | . | . | . | . | . | . |
. | . | . | . | . | . | (n = 52) . | (n = 55) . | . | . | . | . | . | . | . | . |
Acute GVHD | |||||||||||||||
Grades I-IV | 49 | 41 | 0.49 | (0.32,0.75) | .001 | 42 | 39 | 0.49 | (0.31,0.77) | .002 | |||||
Grades II-IV | 44 | 37 | 0.57 | (0.37,0.89) | .01 | 39 | 35 | 0.55 | (0.35,0.88) | .01 | |||||
Grades III-IV | 24 | 21 | 0.72 | (0.40,1.30) | .28 | 22 | 20 | 0.70 | (0.38,1.28) | .24 | |||||
Chronic GVHD | |||||||||||||||
Original treatment assignment | 12 | 25 | 2.33 | (1.16,4.71) | .02 | 12 | 23 | 1.78 | (0.88,3.63) | .11 | |||||
Censored at steroid treatment | 1 | 12 | 6.28 | (0.81,48.4) | .08 | 1 | 10 | 3.70 | (0.47,29.1) | .21 | |||||
All deaths | 43 | 43 | 0.85 | (0.56,1.30) | .45 | ||||||||||
Relapse | 17 | 13 | 0.55 | (0.27,1.13) | .10 | ||||||||||
Nonrelapse mortality | 31 | 31 | 0.77 | (0.47,1.27) | .31 | ||||||||||
Relapse-free survival | 12 | 18 | 0.69 | (0.46,1.04) | .07 | ||||||||||
Infection | |||||||||||||||
First infection | 38 | 36 | 0.79 | (0.50,1.25) | .32 | 33 | 31 | 0.68 | (0.42,1.12) | .13 | |||||
All infections | 56 | 61 | 0.97 | (0.68,1.40) | .88 | ||||||||||
First bacterial infection | 29 | 32 | 0.95 | (0.57,1.57) | .84 | ||||||||||
All bacterial infections | 40 | 40 | 0.89 | (0.58,1.38) | .61 | ||||||||||
First fungal infection | 11 | 14 | 1.17 | (0.53,2.59) | .69 | ||||||||||
All fungal infections | 12 | 16 | 1.21 | (0.57,2.56) | .62 | ||||||||||
First invasive infection3-150 | 25 | 26 | 0.90 | (0.52,1.56) | .71 | ||||||||||
All invasive infections3-150 | 27 | 34 | 1.13 | (0.68,1.87) | .64 |
Event . | Intent to Treat . | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
. | GVHD Prophylaxis . | Relative Risk . | Actual Treatment . | . | . | ||||||||||
. | (no. of events) . | Estimate . | 95% CI . | P Value . | GVHD Prophylaxis . | Relative Risk . | . | . | . | . | . | ||||
. | CSP . | CSP + MP . | . | . | . | (no. of events) . | Estimate . | 95% CI . | P Value . | . | . | . | . | . | |
. | (n = 60) . | (n = 62) . | . | . | . | CSP . | CSP + MP . | . | . | . | . | . | . | . | . |
. | . | . | . | . | . | (n = 52) . | (n = 55) . | . | . | . | . | . | . | . | . |
Acute GVHD | |||||||||||||||
Grades I-IV | 49 | 41 | 0.49 | (0.32,0.75) | .001 | 42 | 39 | 0.49 | (0.31,0.77) | .002 | |||||
Grades II-IV | 44 | 37 | 0.57 | (0.37,0.89) | .01 | 39 | 35 | 0.55 | (0.35,0.88) | .01 | |||||
Grades III-IV | 24 | 21 | 0.72 | (0.40,1.30) | .28 | 22 | 20 | 0.70 | (0.38,1.28) | .24 | |||||
Chronic GVHD | |||||||||||||||
Original treatment assignment | 12 | 25 | 2.33 | (1.16,4.71) | .02 | 12 | 23 | 1.78 | (0.88,3.63) | .11 | |||||
Censored at steroid treatment | 1 | 12 | 6.28 | (0.81,48.4) | .08 | 1 | 10 | 3.70 | (0.47,29.1) | .21 | |||||
All deaths | 43 | 43 | 0.85 | (0.56,1.30) | .45 | ||||||||||
Relapse | 17 | 13 | 0.55 | (0.27,1.13) | .10 | ||||||||||
Nonrelapse mortality | 31 | 31 | 0.77 | (0.47,1.27) | .31 | ||||||||||
Relapse-free survival | 12 | 18 | 0.69 | (0.46,1.04) | .07 | ||||||||||
Infection | |||||||||||||||
First infection | 38 | 36 | 0.79 | (0.50,1.25) | .32 | 33 | 31 | 0.68 | (0.42,1.12) | .13 | |||||
All infections | 56 | 61 | 0.97 | (0.68,1.40) | .88 | ||||||||||
First bacterial infection | 29 | 32 | 0.95 | (0.57,1.57) | .84 | ||||||||||
All bacterial infections | 40 | 40 | 0.89 | (0.58,1.38) | .61 | ||||||||||
First fungal infection | 11 | 14 | 1.17 | (0.53,2.59) | .69 | ||||||||||
All fungal infections | 12 | 16 | 1.21 | (0.57,2.56) | .62 | ||||||||||
First invasive infection3-150 | 25 | 26 | 0.90 | (0.52,1.56) | .71 | ||||||||||
All invasive infections3-150 | 27 | 34 | 1.13 | (0.68,1.87) | .64 |
Includes gram-negative, fungal, and polymicrobial infections.