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Table 4 Crude and adjusted odds ratio (95%CI) of hypertension by urinary arsenic species and percentage

From: Association of urinary monomethylated arsenic concentration and risk of hypertension: a cross-sectional study from arsenic contaminated areas in northwestern China

  Tertile Test for trend
Urinary arsenic species   
iAs (μg/g Cr) <7.31 7.31 to 33.68 >33.68  
  Hypertension (no/yes) 150/51 148/54 138/63  
  Crude OR (95% CI) (1.0) 1.073 (0.688, 1.675) 1.343 (0.869, 2.076) p=0.182
  Adjusted OR (95% CI) (1.0) 1.301 (0.772, 2.192) 1.591 (0.963, 2.628) p=0.070
MMA (μg/g Cr) <11.28 11.28 to 37.89 >37.89  
  Hypertension (no/yes) 154/47 151/50 131/71  
  Crude OR (95% CI) (1.0) 1.085 (0.687, 1.714) 1.776 (1.148, 2.746)* p=0.009
  Adjusted OR (95% CI) (1.0) 0.956 (0.565, 1.617) 1.693 (1.028, 2.787)* p=0.033
DMA (μg/g Cr) <66.70 66.70 to 181.85 >181.85  
  Hypertension (no/yes) 156/45 148/54 132/69  
  Crude OR (95% CI) (1.0) 1.265 (0.802, 1.994) 1.812 (1.166, 2.817)* p=0.008
  Adjusted OR (95% CI) (1.0) 1.118 (0.661, 1.891) 1.549 (0.938, 2.559) p=0.082
tAs (μg/g Cr) <93.77 93.77 to 250.61 >250.61  
  Hypertension (no/yes) 156/45 150/52 130/71  
  Crude OR (95% CI) (1.0) 1.202 (0.760, 1.899) 1.893 (1.219, 2.940)* p=0.004
  Adjusted OR (95% CI) (1.0) 1.085 (0.641, 1.837) 1.648 (0.999, 2.721) p=0.046
Urinary arsenic percentage   
iAs (%) <7.30 7.30 to 15.76 >15.76  
  Hypertension (no/yes) 141/60 155/47 140/61  
  Crude OR (95% CI) (1.0) 0.713 (0.457, 1.112) 1.024 (0.669, 1.568) p=0.911
  Adjusted OR (95% CI) (1.0) 1.099 (0.653, 1.853) 1.483 (0.897, 2.453) p=0.125
MMA (%) <11.85 11.85 to 16.41 >16.41  
  Hypertension (no/yes) 141/60 152/50 143/58  
  Crude OR (95% CI) (1.0) 0.773 (0.498, 1.200) 0.953 (0.620, 1.464) p=0.824
  Adjusted OR (95% CI) (1.0) 0.747 (0.446, 1.252) 0.985 (0.586, 1.655) p=0.958
DMA (%) <68.73 68.73 to 79.07 >79.07  
  Hypertension (no/yes) 138/63 158/43 140/62  
  Crude OR (95% CI) (1.0) 0.596 (0.380, 0.935)* 0.970 (0.636, 1.480) p=0.887
  Adjusted OR (95% CI) (1.0) 0.548 (0.327, 0.920)* 0.697 (0.420, 1.156) p=0.152
  1. Data were based on log-transformed values.
  2. Cut points were determined by tertile of overall study participants.
  3. Adjusted OR were odds ratio adjusted for gender, age, cigarette smoking, alcohol consumption and BMI.
  4. * p<0.05.