Table 3.

Meta-regression analysis.

	Coef	95% confidence interval (p-value)
Sodium analysis (ref: as per urine samples)	n = 12
Formula-based	0.60	−0.14; 1.36 (0.102)
Survey scope (ref: national)	n = 12
Community	0.96	0.23; 1.68 (0.015)
Urine collection (ref: 24 h)	n = 12
Different than 24 h	0.61	−0.14; 1.36 (0.102)
Proportion of men (continuous) n = 11	−0.06	−0.17; 0.04 (0.196)
Mean age (continuous) n = 10	0.03	−0.06; 0.11 (0.519)
Proportion of hypertension (continuous) n = 9	0.02	−0.04; 0.08 (0.476)
Publication year (continuous) n = 12	−0.26	−0.53; −0.00 (0.049)

Estimates in bold are those with p < 0.05.