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Table 2 HR for primary and secondary end points by univariate Cox proportional hazard regression analysis

From: Prognostic value of new left atrial volume index severity partition cutoffs after cardiac rehabilitation program in patients undergoing cardiac surgery

   LA severity partition cut-off
  LA enlargement (LAVi > 34 ml/m2) Mild LA enlargement Moderate LA enlargement Severe LA enlargement
MACCEs HR (95 % CI) p HR (95 % CI) p HR (95 % CI) p HR (95 % CI) p
All Patients 2.1 (1.4–3.1) 0.000# 1.2 (0.7–2.2) 0.457 2.2 (1.3–2.7) 0.003* 3.1 (2.0–4.9) 0.000#
CABG Patients 2.1 (1.3–3.2) 0.001* 1.8 (0.7–4.5) 0.201 3.2 (1.2–7.9) 0.013* 6.1 (2.6–14.1) 0.000#
Valve Patients 2.7 (1.2–6.0) 0.011* 1.6 (0.5–4.9) 0.402 2.9 (1.1–7.7) 0.025* 3.3 (1.4–8.0) 0.005#
 Aortic stenosis 6.6 (0.8–51) 0.071 0.1 (0.1–1.0) 0.521 1.9 (0.3–11) 0.482 1.6 (0.2–9.6) 0.060
 Aortic regurgitation 4.2 (1.5–11) 0.004* 3.3 (0.7–15) 0.117 3.7 (1.1–12) 0.028* 4.5 (1.5–13) 0.006*
 Mitral regurgitaton 4.2 (1.5–11) 0.004* 1.9 (0.1–31) 0.638 6.4 (0.7–57) 0.096 7.0 (0.9–57) 0.067
Valve + CABG 2.3 (0.9–5.6) 0.053 1.6 (0.4–6.3) 0.484 2.4 (0.7–7.8) 0.122 2.6 (0.9–7.1) 0.050
All-cause mortality 1.6 (0.9–2.8) 0.064 1.2 (0.5–2.7) 0.533 1.6 (0.7–3.5) 0.258 2.2 (1.1–4.2) 0.025*
CV mortality 2.2 (1.0–4.5) 0.032* 1.2 (0.4–3.7) 0.739 2.5 (0.9–6.6) 0.070 3.1 (1.3–7.4) 0.010*
Heart failure 1.8 (0.9–3.5) 0.057 0.8 (0.2–2.5) 0.796 2.5 (1.0–5.8) 0.034* 2.5 (1.1–5.4) 0.023*
Stroke 1.6 (0.5–4.8) 0.327 1.0 (0.2–5.3) 0.918 n.a. n.a. 3.8 (1.2–11.9) 0.019*
n.a.
ACS 1.9 (0.8–4.4) 0.137 1.5 (0.4–4.9) 0.492 1.6 (0.4–5.9) 0.483 2.6 (0.9–7.4) 0.067
  1. MACCEs major adverse cardiovascular and cerebrovascular events; LA left atrial; LAVi left atrial volume index; HR hazard ratio; CI confidence interval; CABG coronary artery by-pass graft; Valve valve surgery; CV cardiovascular; ACS acute coronary syndrome; n.a not applicable (no event)
  2. P value: difference in comparison with normal LAVi group (≤34 ml/m2) * p < 0.05; # p < 0.001