Table 2.

Laboratory values by group

Variable	Study group				P value
	Caries-free controls		S-ECC
	N (%)	95% CI	N (%)	95% CI
25(OH)D < 50 nmol/L	14/121 (11.6%)	0.06, 0.19	29/141 (20.6%)	0.14, 0.28	0.05
25(OH)D < 75 nmol/L	52/121 (43%)	0.34, 0.52	84/141 (59.6%)	0.51, 0.68	0.007
High PTH > 5.5 pmol/L	7/114 (6.1%)	0.03, 0.12	85/140 (60.7%)	0.52, 0.69	<0.001
Low Hemoglobin < 110 g/L	5/114 (4.4%)	0.01, 0.10	64/140 (45.7%)	0.37, 0.54	<0.001
Low Ferritin < 45 pmol/L	24/118 (20.3%)	0.13, 0.29	45/140 (32.1%)	0.25, 0.41	0.03
Low MCV < 75 fL	18/114 (15.8%)	0.10, 0.24	23/140 (16.4%)	0.11, 0.24	0.9
Iron deficiency	3/114 (2.6%)	0.01, 0.07	26/140 (18.6%)	0.13, 0.26	<0.001
Iron deficiency anemia	7/114 (6.1%)	0.03, 0.12	34/140 (24.3%)	0.17, 0.32	<0.001

CI confidence interval; MCV mean corpuscular volume; PTH parathyroid hormone; S-ECC Severe early childhood caries