. 2018 Jan 19;10(1):103. doi: 10.3390/nu10010103

Table 3.

Linear regression analyses on the association of PRAL and potassium in sex-balanced quintiles as continuous predictor variables with blood pressure levels as continuous outcome variables in a reduced DEGS1 study sample of participants without antihypertensive medication (n = 4677).

		Sample without Antihypertensive Medication (n = 4677)
Predictor	Outcome	β (95% CI)	P_trend	R²
	Systolic blood pressure
PRAL (FFQ), mEq/day	Basic model ^a	0.0375 (0.0094, 0.0657)	0.009 ^c	0.2059
PRAL (FFQ), mEq/day	Adjusted model ^b	0.0375 (0.0086, 0.0664)	0.01 ^c	0.2385
K-Intake (FFQ), g/day	Basic model ^a	−0.2648 (−0.685, 0.1553)	0.2	0.2045
K-Intake (FFQ), g/day	Adjusted model ^b	−0.2210 (−0.6379, 0.1960)	0.3	0.2370
K-Excretion, mmol/day	Basic model ^a	−0.0128 (−0.0257, 0.0002)	0.05	0.2050
K-Excretion, mmol/day	Adjusted model ^b	−0.0280 (−0.0420, −0.0140)	0.0001 ^c	0.2406
	Diastolic blood pressure
PRAL (FFQ), mEq/day	Basic model ^a	0.0068 (−0.0119, 0.0256)	0.5	0.1878
PRAL (FFQ), mEq/day	Adjusted model ^b	0.0064 (−0.0129, 0.0258)	0.5	0.2132
K-Intake (FFQ), g/day	Basic model ^a	−0.1954 (−0.4718, 0.0810)	0.2	0.1882
K-Intake (FFQ), g/day	Adjusted model ^b	−0.1880 (−0.4597, 0.0836)	0.2	0.2136
K-Excretion, mmol/day	Basic model ^a	−0.0085 (−0.0167, −0.0002)	0.04 ^c	0.1886
K-Excretion, mmol/day	Adjusted model ^b	−0.0144 (−0.0238, −0.0049)	0.003 ^c	0.2154

^a Adjusted for age, sex, and BMI; ^b Basic model, additionally adjusted for size of BP cuff, fasting duration (> or <8 h), smoking status, natrium excretion, alcohol intake, eGFR, serum glucose, and total cholesterol; ^c Bold numbers indicate significant p-values (<0.05); PRAL, potential renal acid load; DEGS1, German Health-Interview and Examination Survey for Adults; CI, confidence interval; FFQ, food frequency questionnaire; BMI, body mass index; eGFR, estimated glomerular filtration rate calculated according to the four-variable MDRD formula.