. Author manuscript; available in PMC: 2013 Mar 1.

Published in final edited form as: Pediatr Res. 2012 Jan 11;71(3):286–292. doi: 10.1038/pr.2011.37

Table 2.

Intraclass correlation coefficients assessing inter-rater reliability of WIC usual care measurements, overall and by child factors and source

Factor	N (%)	Height (cm)	Height for Age Percentile	Weight (kg)	Weight for Age Percentile	BMI (kg/m²)	BMI Percentile
Overall (with 95% confidence intervals)	287 (100%)	.96 (.92, 1.00)	.89 (.82, .95)	.99^*	.97 (.94, 1.00)	.93 (.92, .95)	.90 (.88, .92)
Age of child
2–3 years	87 (30%)	.90	.83	.98	.94	.93	.84
3–4 years	103 (36%)	.92	.89	.99	.98	.94	.89
4–5 years	97 (34%)	.94	.95	.96	.96	.90	.86
Sex of child
Female	136 (47%)	.96	.91	.99	.98	.93	.93
Male	151 (53%)	.97	.86	.99	.96	.93	.87
Race/ethnicity of child
African American	23 (8%)	.77	.92	.55	.99	.93	.95
Asian^**	7 (2%)	--	--	--	--	--	--
Hispanic	230 (80%)	.97	.89	.99	.98	.94	.90
Non-Hispanic white	27 (9%)	.71	.81	.88	.97	.80	.85
Preferred language of family
English	146 (51%)	.97	.92	.99	.97	.93	.88
Spanish	141 (49%)	.95	.89	.98	.98	.91	.91
Child height^§
<100 cm	167 (58%)	.89	.86	.98	.97	.89	.87
≥100 cm	120 (42%)	.92	.92	.98	.99	.95	.93
Child weight^§
<16 kg	137 (48%)	.91	.85	.92	.94	.82	.81
≥16 kg	150 (52%)	.93	.88	.98	.97	.93	.98
Child BMI^§
<16.5 kg/m²	126 (44%)	.99	.96	.99	.97	.86	.86
≥16.5 kg/m²	161 (56%)	.92	.83	.99	.95	.88	.59
Child BMI percentile^§
<75^th	140 (49%)	.98	.92	.98	.97	.83	.81
≥75^th	147 (51%)	.91	.87	.99	.95	.89	.50
Source of WIC values
In-clinic	268 (93%)	.97	.91	.99	.98	.95	.91
Provider record	19 (7%)	.89	.63	.94	.95	.64	.74

Confidence interval could not be computed due to extremely high agreement.

^**

Not reported due to small sample size

^§

The median was used to dichotomize these variables