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Table 3 Mean values of quantifiers used to respond in the NDI questionnaire. The last column of the table contains the number of answers with a non-zero value for the particular quantifier

From: Evaluation of using the Anderson-Montesano and the Tuli classifications in pediatric patients with occipital condyle fractures

Quantifier of the NDI questionnaire Mean No. of instances in the survey
Pain intensity 1.1666667 6
Personal care 0.1666667 1
Lifting 0.1666667 1
Reading 0.5000000 3
Headaches 0.8333333 4
Concentration 0.3333333 2
Work 0.1666667 1
Sleeping 0.8333333 5
Recreation 0.1666667 1