The participants who survived were followed up for at least three years. The first end-point of this study was cardiovascular death. The second end-point of this study was a composite
outcome: death or urgent hospitalisation for cardiovascular reasons. Continuous variables with a normal distribution (ie, age, 6-minute walk test distance, LVEF, eGFR, haemoglobin, and uric acid) were presented as means and standard deviations. The between-group differences were tested using Student’s t-test. The remaining continuous variables (ie, plasma NT-proBNP and serum hs-CRP) had a skewed distribution and SB431542 were expressed as medians with lower and upper quartiles. These between-group differences were tested using the Mann Whitney
U-test. For further analyses, these variables were log transformed in order to normalise their distribution. The categorical variables were expressed as numbers with percentages. The between-group differences were tested using the chi-squared test. The relationship between the 6-minute walk test and the long-term clinical outcomes was assessed by using univariate and multivariate regression models. The associations between the analysed parameters and survival were established using Cox proportional hazards analysis. The number of variables included in the multivariable models was dependent on the number of events (ie, 1 predictor for 10 events). The following Olaparib parameters were included in the analyses as potential predictors of death, and death or hospitalisation: age,
heart failure aetiology, NYHA class, LVEF%, NT-proBNP (log), haemoglobin, hs-CRP (log), uric acid, renal function Sitaxentan assessed using eGFR, the presence of diabetes mellitus, hypertension, and the 6-minute walk test distance. The 6-minute walk test was included in Cox regression analysis as a continuous variable and as a dichotomous variable determined by the median. In order to illustrate the relationship between 6-minute walk test distance and 3-year event-free survival rates, Kaplan-Meier curves for cumulative survival were constructed. The median distance of the walk was considered an arbitrary cut-off point during the curve construction. Differences in event-free survival rates were tested using the Cox-Mantel log-rank test. A value of p < 0.05 was considered statistically significant. Among the 243 men recruited for the study, all who survived were followed up for at least three years. No surviving participant was lost to follow-up. The clinical characteristics of the study participants are presented in Table 1. The mean distance covered during the baseline 6-minute walk test was 444 m (SD 129). The participants’ mean scores on the 0–10 Borg scale were 6 (SD 1) for dyspnoea and 5 (SD 2) for fatigue.