Total (n) | 3 year follow up | 6.1 year follow up | Median survival (years) | Log rank test p value | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Deaths (n) | Survival actual (%) | Deaths (n) | Survival K-M (%) | ||||||||||
Patients < 70 years of age (n=53) | |||||||||||||
Normal ECG, normal N-ANP | 26 | 1 | 96 | 1 | 96 | > 6.1 | Reference | ||||||
Abnormal ECG, normal N-ANP | 22 | 2 | 91 | 4 | 82 | > 6.1 | 0.052 | ||||||
Normal ECG, raised N-ANP | 1 | 0 | 100 | 0 | 100 | > 6.1 | 1.0 | ||||||
Abnormal ECG, raised N-ANP | 4 | 3 | 25 | 3 | 25 | 1.6 | < 0.0001 | ||||||
Patients ⩾ 70 years of age (n=67) | |||||||||||||
Normal ECG, normal N-ANP | 28 | 4 | 86 | 8 | 71 | > 6.1 | Reference | ||||||
Abnormal ECG, normal N-ANP | 27 | 4 | 85 | 8 | 70 | > 6.1 | 0.46 | ||||||
Normal ECG, raised N-ANP | 5 | 0 | 100 | 3 | 40 | 5.2 | 0.17 | ||||||
Abnormal ECG, raised N-ANP | 7 | 6 | 14 | 7 | 0 | 1.1 | 0.0003 |
The p values test the hypothesis that 6.1 year survival in a group equals survival in the age matched reference group with a normal ECG and N-ANP.
Survival is shown as actual percentages at 3 years and as Kaplan-Meier (K-M) estimates at 6.1 years.