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42 Chapter 2. Pain
When taking a series of measurements over time, patients may be able to recall their previous scores, thus not producing a true reflection of their reported pain. Some questions over the validity of the questionnaire in elderly patients or those with a cogni
Weaknesses
Easy to administer. Can be used to measure pain at intervals, over time. Easy to administer and can be used with those with low verbal skills.
Strengths
The scale requires the patient to define the intensity of their pain in numerical terms between 0 (no pain) – 100 (severe pain) by writing their number of choice on the scale. Higher scores indicate more severe pain. Patient rates the intensity of the pain on a
Purpose greater pain.
Table 2.4 (continued) Measure Numerical Pain Rating Scale (NPRS) Wong Faces Scale
