Table 2 Predictive value of the FHR level for all-cause and cardiovascular mortality

All-cause mortality

 Quartile 1

Ref

Ref

Ref

 Quartile 2

1.18 (1.04–1.35)

0.013

1.24 (1.09–1.41)

0.001

1.16 (0.98–1.37)

0.090

 Quartile 3

1.28 (1.23–1.45)

 < 0.001

1.35 (1.19–1.54)

 < 0.001

1.25 (1.06–1.47)

0.008

 Quartile 4

1.55 (1.37–1.76)

 < 0.001

1.74 (1.54–1.97)

 < 0.001

1.48 (1.26–1.75)

 < 0.001

Cardiovascular mortality

 Quartile 1

Ref

Ref

Ref

 Quartile 2

1.55 (1.24–1.94)

 < 0.001

1.66 (1.33–2.07)

 < 0.001

1.84 (1.35–2.50)

 < 0.001

 Quartile 3

1.82 (1.47–2.25)

 < 0.001

1.97 (1.59–2.44)

 < 0.001

2.15 (1.59–2.91)

 < 0.001

 Quartile 4

2.45 (1.99–3.01)

 < 0.001

2.88 (2.34–3.54)

 < 0.001

2.70 (1.99–3.65)

 < 0.001