. Author manuscript; available in PMC: 2019 Jun 28.

Published in final edited form as: J Hum Hypertens. 2003 Sep;17(9):609–622. doi: 10.1038/sj.jhh.1001604

Table 7.

Partial product moment (Pearson) correlation coefficients between INTERMAP dietary and urinary measurements of protein, sodium, potassium, and Na/K adjusted for sample and gender

Variables	China^a	Japan^a	UK^a	USA^a	All men^b	All women^b	All^a
Number of participants	839	1145	501	2195	2359	2321	4680
Dietary protein and urine urea	0.395	0.524	0.480	0.521	0.501	0.511	0.508
Dietary protein and EPI^c	0.404	0.520	0.469	0.514	0.496	0.506	0.503
Dietary Na and urine Na	0.332	0.450	0.355	0.462	0.417	0.409	0.415
Dietary K and urine K	0.303	0.565	0.507	0.580	0.519	0.580	0.553
Dietary Na/K and urine Na/K	0.281	0.530	0.477	0.512	0.385	0.449	0.419

Adjusted for sample and gender.

Adjusted for sample only.

Estimated protein intake (g/day), calculated as: (urea nitrogen+0.031 (body weight in kg)) × 6.25.