Table 3 Univariate analysis about the risk of hypertension among participants

Male (vs. Female)

1.17

0.95–1.44

0.146

Urban (vs. Rural)

0.56

0.45–0.69

0.001*

Age (years)

0.99

0.98–1.01

0.090

BMI (kg/m2)

1.05

1.01–1.08

0.002*

SRS using or used (vs. Never use)

0.77

0.62–0.96

0.019*

Alcohol consumption (vs. Nondrinkers)

1.55

1.24–1.93

0.001*

Number of antihypertensive drugs taken, n (%)

 2 (vs. 1)

1.45

1.14–1.83

0.000*

 ≥ 3 (vs. 1)

2.64

1.57–4.46

0.002*

Salt intake Quartile

 Kawasaki method

  Q1(< 9.55) vs. Q4(> 14.24) (g/day)

0.52

0.39–0.71

0.001*

  Q2(9.55–11.78) vs. Q4(> 14.24) (g/day)

0.61

0.45–0.82

0.001*

  Q3(11.78–14.24) vs. Q4(> 14.24) (g/day)

0.67

0.50–0.91

0.009*

 INTERSAL method

  Q1(< 7.54) vs. Q4(> 10.43) (g/day)

0.55

0.41–0.74

0.001*

  Q2(7.54–8.91) vs. Q4(> 10.43) (g/day)

0.62

0.46–0.84

0.002*

  Q3(8.91–10.43) vs. Q4(> 10.43) (g/day)

0.71

0.52–0.95

0.022*

 Tanaka method

  Q1(< 7.80) vs. Q4(> 10.78) (g/day)

0.59

0.44–0.80

0.001*

  Q2(7.80–9.27) (vs. Q4(> 10.78) (g/day)

0.60

0.44–0.81

0.001*

  Q3(9.27 –10.78) vs. Q4(> 10.78) (g/day)

0.89

0.66–1.20

0.454