Table 2.
Distribution of covaritaes over time (%)
| Variable | 2005 | 2006 | 2007 | 2008 | 2009 | p-valuea | p-valueb |
|---|---|---|---|---|---|---|---|
| statin | 1.1 | 1.5 | 1.5 | 1.6 | 1.8 | < 0.01 | 0.01 |
| male | 41.9 | 40.8 | 41.9 | 41.6 | 42.4 | 0.09 | 0.35 |
| tobacco | 10.7 | 11.9 | 11.1 | 10.9 | 11.5 | 0.47 | 0.19 |
| CHF | 2.3 | 2.2 | 2.4 | 2.0 | 2.7 | 0.05 | 0.43 |
| circulatory | 3.5 | 2.9 | 3.8 | 3.3 | 4.2 | < 0.01 | 0.07 |
| IHD | 5.5 | 5.4 | 5.6 | 5.1 | 5.4 | 0.70 | 0.46 |
| CeVD | 2.9 | 2.4 | 2.5 | 2.7 | 2.5 | 0.45 | 0.04 |
| obesity | 7.2 | 6.9 | 6.7 | 6.8 | 8.8 | < 0.01 | 0.07 |
| hyplipid | 13.1 | 13.2 | 13.5 | 15.9 | 17.9 | < 0.01 | 0.32 |
| mean age | 61.5 | 61.1 | 61.7 | 61.0 | 61.3 | 0.08 | 0.07 |
a
Somers’ D test of association between the years 2005–2009.
b
Somers’ D test of association between the years 2005–2007.
The associations between the covariates with calendar time were attenuated over this shorter time period