Pain Rating Scales Comparison
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Direct answer
A four-year-old cannot score pain out of ten, and a patient with advanced dementia cannot use a faces chart — pain measurement succeeds only when the tool matches the person. Unidimensional intensity tools dominate ward practice: the Numeric Rating Scale (0-10) for adults who understand numbers, the Visual Analogue Scale (a 10 cm line the patient marks) for sensitivity to change, the Wong-Baker FACES from about three years of age, and observational tools where behaviour substitutes for self-report — FLACC for infants and non-verbal children, CRIES for neonates, PAINAD in advanced dementia. Self-report remains the gold standard wherever the patient can give it; scores band into mild (1-3), moderate (4-6) and severe (7-10); and reassessment after intervention — about 30 minutes after intravenous, about 60 after oral — closes the loop between score and action.
What you must remember
- Numeric Rating Scale: 0 (no pain) to 10 (worst imaginable), spoken or written — the default adult tool; needs number comprehension.
- Visual Analogue Scale: a 10 cm line, marked by the patient — more sensitive to small change, but requires vision, paper and time; useless in the visually impaired.
- Wong-Baker FACES: six faces from smiling to crying; from about 3 to 8 years and across language and literacy barriers — it asks how much it hurts, not how sad the child feels.
- FLACC: Face, Legs, Activity, Cry, Consolability — five categories each scored 0-2, total 0-10; valid from 2 months to about 7 years and in non-verbal children of any age.
- CRIES: Cry, Requires supplemental oxygen, Increased vital signs, Expression, Sleeplessness — the neonatal postoperative tool, each item 0-2.
- PAINAD: breathing, negative vocalisation, facial expression, body language, consolability — for advanced dementia, scored by observation.
- McGill Pain Questionnaire: the multidimensional classic mapping sensory, affective and evaluative word choices — a pain-clinic and research instrument, not a ward score.
- Bands and follow-through: mild 1-3, moderate 4-6, severe 7-10; record score, intervention and re-score — a score without an action and a re-check is decoration.
One ward, four patients, four tools
Walk a surgical ward at 8 a.m. Patient one, a 45-year-old teacher after cholecystectomy: numeric rating scale — she says 6, moderate, so the stepped plan proceeds and a re-score is due within the hour. Patient two, a four-year-old with a forearm fracture: Wong-Baker FACES — she points to the crying face; analgesia is weight-based and her parent stays for distraction. Patient three, a 26-year-old with cerebral palsy and no speech: FLACC — scored from observation of grimace, tense legs, cry and how hard he is to console; the number belongs to the observation, so the same observer should reassess. Patient four, an 82-year-old with advanced dementia and a hip fracture: PAINAD, watching vocalisation and consolability before and after the scheduled analgesia. The comparison is the lesson: intensity from the verbal, behaviour from the non-verbal — and in every case it is the change in score after an intervention that drives the next decision, not the absolute number.
Where students slip
The recurring errors: assigning FLACC to a neonate (CRIES is the neonatal tool; FLACC begins at two months) and FACES below age three; quoting vital signs as proof of pain or its absence (they are neither sensitive nor specific); and switching scales between assessments — trends compare honestly only on the same instrument. Expected stems: "the best scale for a non-verbal five-year-old" (FLACC), "a scale for a two-month-old post-operative infant" (CRIES), "the gold standard of pain assessment" (self-report).
Frequently asked questions
Which pain scale suits a non-verbal three-year-old?
FLACC — face, legs, activity, cry, consolability, each 0-2 for a 0-10 total; it serves infants from two months and non-verbal children.
What scale scores neonatal postoperative pain?
CRIES — crying, requirement of oxygen, increased vital signs, expression, sleeplessness — validated for neonates, each item scored 0-2.
How do the numeric and visual analogue scales differ?
The numeric scale is a verbal 0-10 rating; the visual analogue scale is a mark on a 10 cm line — more sensitive to small change but needing vision and time.
What are the severity bands on a 0-10 scale?
Mild 1-3, moderate 4-6, severe 7-10 — analgesic choice and reassessment timing follow the band.
Why are vital signs not a pain scale?
Heart rate and blood pressure rise for many reasons and may normalise in chronic pain — neither sensitive nor specific; self-report or validated observation outranks them.