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Table 1 Calculating the VPC sum

From: A randomised controlled trial comparing palate surgery at 6 months versus 12 months of age (the TOPS trial): a statistical analysis plan

Component Classification Score for component
Hypernasality Within normal limits 0
Mild resonance 1
Moderate/severe resonance 2
Non-oral errors 0–2 errors 0
3–5 errors 1
≥ 6 errors 2
Velopharyngeal insufficiency symptoms 0–2 symptoms 0
3–5 symptoms 1
≥ 6 symptoms 2
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