Table 4 Multivariate Cox regression analysis for 5-year new stroke outcome in octogenarians (excluding recurrent stroke)

Time-varying AF

1.26 (0.62, 2.57), 0.53

1.03 (0.28, 3.77), 0.96

1.60 (0.67, 3.85), 0.29

Baseline warfarin or aspirin (ref: no)

1.35 (0.72, 2.52), 0.35

1.13 (0.43, 2.95), 0.80

1.51 (0.65, 3.48), 0.34

Age

1.11 (0.95, 1.28), 0.19

1.05 (0.89, 1.23), 0.56

1.87 (0.98, 3.56), 0.06

Gender (ref: men)

0.78 (0.45, 1.37), 0.39

0.65 (0.26, 1.62), 0.36

0.88 (0.43, 1.83), 0.74

Ethnicity (ref: non- Māori)

1.77 (0.95, 3.31), 0.07

-

-

NZDep med (ref = high)

0.67 (0.33, 1.35), 0.26

0.65 (0.20, 2.15), 0.49

0.61 (0.25, 1.49), 0.28

NZDep low (ref = high)

0.54 (0.27, 1.09), 0.09

0.39 (0.13, 1.21), 0.10

0.67 (0.28, 1.62), 0.37

Baseline SBP

1.01 (1.00, 1.03), 0.03

1.02 (1.00, 1.04), 0.03

1.01 (0.99, 1.02), 0.25

Statin (ref = no)

0.73 (0.39, 1.39), 0.34

1.03 (0.38, 2.79), 0.95

0.58 (0.24, 1.35), 0.20

CHF, prior (ref = no)

0.75 (0.32, 1.73), 0.45

0.35 (0.08, 1.61), 0.18

1.21 (0.43, 3.36), 0.72