Table 3

Results of simple and multivariable regression between mercury and HRV and BP parameters

Mercury (nmol/L)§

HRV and BP parameters
Simple analysis
Multivariable analysis



r Pearson
Crude β (95% CI)
Adjusted β (95% CI)
Model R2

VLF (ms2)§ a
-0.13
-0.12 (-0.26, 0.03)
-0.06 (-0.20, 0.07)
0.12**
LF (ms2)§ b
-0.18*
-0.20* (-0.38, -0.03)
-0.01 (-0.18, 0.16)
0.21***
HF (ms2)§ c
-0.11
-0.12 (-0.27, 0.03)
-0.01 (-0.17, 0.15)
0.17**
LF/HF § d
-0.10
-0.22 (-0.51, 0.07)
0.01 (-0.33, 0.34)
0.24***
NN (ms) e
0.04
6.32 (-13.62, 26.27)
-5.75 (-27.90, 16.41)
0.19***
SDNN (ms)§ f
-0.14*
-0.06* (-0.12, -0.001)
-0.056 (-0.12, 0.01)
0.09**
SDANN (ms)§ g
-0.09
-0.05 (-0.11, 0.01)
-0.086* (-0.16, -0.01)
0.02
rMSSD (ms) § h
-0.12
-0.06 (-0.12, 0.01)
-0.03 (-0.09, 0.04)
0.12**
pNN50 (%) § i
-0.12
-0.19 (-0.39, 0.02)
-0.09 (-0.32, 0.13)
0.12*
CVRR (%) § j
-0.18*
-0.07* (-0.12, -0.01)
-0.057 (-0.11, 0.001)
0.03*
SBP (mm Hg) k
0.25***
5.20*** (2.70, 7.70)
4.77* (1.12 – 8.42)
0.27***
DBP (mm Hg) l
0.01
0.13 (-1.44, 1.71)
1.99 (-0.29, 4.29)
0.08*
PP (mm Hg) m
0.33***
5.07*** (3.15 – 6.99)
3.40* (1.11 – 5.69)
0.41***

* p < 0.05; ** p < 0.01; *** p < 0.0001; § Log-transformed variables; a model adjusted for HDL, WC and DHA; b model adjusted for smoking, DHA, triglycerides, EPA, WC, HOMA-IR and age; c model adjusted for smoking, triglycerides, EPA, alcohol, DHA, HOMA-IR, HDL, gender and WC; d model adjusted for alcohol, DHA, HDL, EPA, LDL, triglycerides, age, HOMA-IR, WC, gender and socio-economic status; e model adjusted for total income, EPA, smoking, gender, HOMA-IR, HDL and age; f model adjusted for EPA and HOMA-IR; g model adjusted for EPA; h model adjusted for smoking, HDL, DHA, WC and HOMA-IR; i model adjusted for smoking, HDL, HOMA-IR, DHA, age and WC; j model adjusted for EPA; k model adjusted for age, WC and selenium; l model adjusted for EPA, selenium and triglycerides; m model adjusted for selenium, WC and age.

Valera et al. Environmental Health 2008 7:29   doi:10.1186/1476-069X-7-29