. 2019 Apr 23;11(4):911. doi: 10.3390/nu11040911

Table 2.

Interaction between BP groups and serum 25(OH)D levels for calcium intake.

Nutrient Intake	25(OH)D Level	HTN	NBP	p for Interaction
Nutrient Intake	25(OH)D Level	Mean (SD)	Mean (SD)	p for Interaction
Calcium (mg/1000 kcal)	Low	291 (118)	263 (91.8)	0.015
Calcium (mg/1000 kcal)	Normal	293 (111)	311 (117)	0.015

p values for the interaction from a two-way analysis of variance. p value <0.05 is in bold. Nutrient data were adjusted for energy using the density method as a percentage of daily energy intake. Hypertension was defined as the use of antihypertensive medication or a BP of 140/90 mmHg or higher. A low serum 25(OH)D level was defined as a 25(OH)D value of 20 ng/mL or lower. A total of 201 subjects had a low serum 25(OH)D level; 110 had normal BP and 91 had hypertension. There were 418 subjects with a normal serum 25(OH)D level; 166 had a normal BP and 252 had hypertension. Abbreviations: BP, blood pressure; HTN, hypertension; NBP, normal blood pressure; 25(OH)D, 25-hydroxyvitamin D.