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. Author manuscript; available in PMC: 2010 Aug 25.
Published in final edited form as: J Am Coll Cardiol. 2009 Aug 25;54(9):840–850. doi: 10.1016/j.jacc.2009.06.008

Table 2.

Multiple Regression Analysis Between Direct Sympathetic Nerve Activity and QT Data at Baseline

ln 300 s iSGNA
 ln 300 s iVNA
 Intercept
R R2 p Value β SE Beta p Value β SE Beta p Value β SE p Value
RRm, ms 0.61 0.37 0.0001 — — — 0.065 0.50 0.11 0.61 0.0001 −0.94 0.40 0.025
RRv, ln ms2 −0.62 0.39 0.0001 −0.62 0.27 30.50 0.001 0.78 0.28 0.37 0.010 11.4 1.3 0.0001
QTm, ms 0.60 0.36 0.0001 — — — 0.160 0.13 0.03 0.60 0.0001 — — 0.065
QTv ln ms2 — — 0.688 — — — 0.807 — — — 0.412 — — 0.230
QTcBazett 0.49 0.24 0.003 — — — 0.421 0.05 0.02 0.48 0.003 — — 0.083
QTcFridericia 0.56 0.31 0.0001 — — — 0.263 0.08 0.02 0.56 0.0001 — — 0.944
QTcTabo 0.54 0.29 0.001 — — — 0.302 0.07 0.02 0.54 0.001 — — 0.644
QTc Van de Water 0.57 0.32 0.0001 — — — 0.256 0.08 0.02 0.57 0.0001 — — 0.661
QTcFramingham 0.50 0.25 0.002 — — — 0.503 0.05 0.01 0.50 0.002 — — 0.081
QTVI 0.40 0.16 0.012 — — — 0.460 30.47 0.17 30.41 0.012 — — 0.204

Bold values indicate a statistical significance.

Abbreviations as in Table 1.