Table 3.

Sensitivity and specificity of tool for high-risk stunting groups in the development (n=839) and validation (n=338) data sets (complete cases), when the tool is applied at 6 months of age

Predicted probability of being stunted at 3 years of age	Sensitivity of tool		Specificity of tool		% of children who are actually stunted at 3 years of age, of those predicted to be at high risk of stunting
	Development data set	Validation data set	Development data set	Validation data set	Development data set (n=839)	Validation data set (338)
High-risk cut-off set at ≥20%	82.0% (114/139)	56.4% (31/55)	75.7% (530/700)	86.2% (244/283)	40.1	44.3
High-risk cut-off set at ≥15%	88.5% (123/139)	63.6% (35/55)	67.3% (471/700)	82.0% (232/283)	34.9	40.7
High-risk cut-off set at ≥10%	94.2% (131/139)	83.6% (46/55)	54.9% (384/700)	74.2% (210/283)	29.3	38.7