Table 3: Classification analysis using Hosmer-Lemeshow goodness-of-fit test for EuroSCORE II of the n=621 Greek cardiac surgery patients who participated in the study. Columns present observed and expected cases according to the estimated risk, divided in 10 percentiles groups (1: 0-10%, 2: 11-20%, etc).

Estimated Risk Class Patients Who Died Patients Who Were Alive Total Patients
Observed Expected1 Observed Expected1
0-10% 0 1.20 63 61.80 63
11-20% 0 1.22 63 61.78 63
21-30% 1 1.24 62 61.76 63
31-40% 0 1.24 62 60.76 62
41-50% 1 1.26 61 60.74 62
51-60% 0 1.29 62 60.71 62
61-70% 1 1.34 61 60.66 62
71-80% 2 1.40 59 59.60 61
81-90% 4 1.53 57 59.47 61
91-100% 9 6.27 53 55.73 62
Overall, n 18 17.99 603 603.01 621

1Note: the expected proportion of cases is computed using the coefficients from the applied logistic regression; the Hosmer-Lemeshow test value was 10.9, (p = 0.21), suggesting good fit of the observed to the expected values (Ho: Null hypothesis).