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Table 1 Characteristics of subjects with or without hypertension with regard to gender, cigarette smoking, alcohol consumption, age, BMI and urinary arsenic speciation

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

Characteristics Hypertension p-value
  No Yes  
n 436 168  
Gender a    
  Male 182 (41.7%) 73 (43.5%) 0.703
  Female 254 (58.3%) 95 (56.5%)  
Cigarette smoking a    
  Never 293 (67.2%) 119 (70.8%) 0.390
  Current or former 143 (32.8%) 49 (29.2%)  
Alcohol consumption a    
  Never 336 (77.1%) 127 (75.6%) 0.702
  Current or former 100 (22.9%) 41 (24.4%)  
Age b 46.37 (13.39) 57.58 (12.05) <0.001
BMI(kg/m 2 ) b 22.53 (3.19) 24.65(3.89) <0.001
Urinary arsenic species (μg/g Cr) c    
  iAs 12.83 (10.96, 15.02) 17.11 (13.44, 21.79) 0.050
  MMA 17.35 (15.33, 19.62) 23.75 (19.33, 29.18) 0.009
  DMA 94.17 (85.50, 103.70) 123.95 (105.26, 145.96) 0.004
  tAs 135.59 (123.03, 149.43) 178.33 (151.43, 210.01) 0.004
Urinary arsenic percentage (%) c    
  iAs 9.46 (8.62, 10.39) 9.60 (8.28, 11.12) 0.876
  MMA 12.79 (12.06, 13.57) 13.32 (12.20, 14.55) 0.468
  DMA 69.45 (67.52, 71.43) 69.51 (67.10, 72.00) 0.974
  1. a Values are number (%).
  2. b Values are mean (standard deviation).
  3. c Values are geometric mean (95% confidence interval).