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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.