This provided a hazard ratio (HR) with a 95% confidence interval (CI).
Since diabetes and the comorbidity score were considered
substantially correlated (r = 0.63), comorbidity was
not included as a co-variable in the model; instead, the
presence or absence of coronary artery disease was
included as an important clinical variable. A one-way
analysis of variance (F-statistics) was used to test differences
in the means of the subscales of SF-36 between
groups, and thereafter, post hoc multiple comparisons
using the Bonferroni test. The data were analysed using
SPSS for Windows, version 19 (SPSS, Chicago, U.S.).A
value of p ≤ 0.05 was considered significant.