TABLE 2
FROM:
Salt and blood pressure in children and adolescents
F J He, N M Marrero and G A MacGregor
BACK TO ARTICLETable 2. Regression models of systolic blood pressure on related variables
| Model 1 (R2=0.322, P<0.001) | Model 2 (R2=0.314, P<0.001) | Model 3 (R2=0.172, P<0.001) | Model 4 (R2=0.327, P<0.001) | |||||
|---|---|---|---|---|---|---|---|---|
| b (s.e.) | P-values | b (s.e.) | P-values | b (s.e.) | P-values | b (s.e.) | P-values | |
| Salt intake (g/day) | 0.40 (0.17) | 0.018 | 0.36 (0.17) | 0.035 | 0.60 (0.23) | 0.009 | 0.39 (0.17) | 0.027 |
| Age (years) | 0.86 (0.07) | <0.001 | 0.72 (0.09) | <0.001 | 1.63 (0.16) | <0.001 | 0.85 (0.08) | <0.001 |
| Sex | 2.06 (0.49) | <0.001 | 1.96 (0.50) | <0.001 | 2.94 (0.82) | <0.001 | 2.19 (0.50) | <0.001 |
| BMI (kg/m2) | 0.80 (0.08) | <0.001 | — | — | — | — | 0.82 (0.08) | <0.001 |
| Waist/hip ratio (N=985) | — | — | — | — | 0.52 (4.58) | 0.91 | — | — |
| Mid-arm circumference (cm) | — | — | 0.77 (0.08) | <0.001 | — | — | — | — |
| Potassium intake (g/day) | 0.39 (0.48) | 0.41 | 0.13 (0.48) | 0.782 | 0.45 (0.64) | 0.477 | 0.41 (0.49) | 0.402 |
| Salt added in cooking | — | — | — | — | — | — | 0.85 (0.49) | 0.083 |
| Salt added at the table | — | — | — | — | — | — | -0.05 (0.59) | 0.928 |
Abbreviation: BMI, body mass index.
In model 1 of multiple linear regression, dependent variable was systolic blood pressure and independent variables were age, sex (boy=1, girl=0), BMI, salt and potassium intake. Models 2 and 3 were the same as model 1 except that BMI was replaced with mid-arm circumference and waist/hip ratio, respectively. In model 4, two additional variables, that is, salt added in cooking (yes=1, no=0) and salt added at the table (usually=1, occasionally or rarely or never=0), were added to model 1.