decision tree comparison
Pain Assessment Scales: When to Use Which
The NCLEX gives you a patient who can't verbalize pain — a sedated adult, a 2-year-old, a patient with advanced dementia — and asks which scale to use. Defaulting to the 0-10 numeric scale for everyone means you're collecting garbage data and missing the correct answer.
Comparison
Can the patient self-report pain?
- YES → Go to: What is the patient's age and developmental level?
- NO → Go to: Why can't they self-report?
YES — Patient CAN self-report
Adult or adolescent (≥ 8 years, cognitively intact)?
- Numeric Rating Scale (NRS) 0-10
- Ask: "Rate your pain, 0 is no pain, 10 is the worst imaginable"
- Also acceptable: Visual Analog Scale (VAS) — 10-cm line, patient marks intensity
- Document the number; reassess after intervention using the same scale
Child age 3-7 (or any patient who struggles with numbers)?
- Wong-Baker FACES Scale
- Six cartoon faces from smiling (0) to crying (10)
- Let the child point; do NOT say "which face are you making" — ask "which face shows how much hurt you have?"
- Can also use for adults with mild cognitive impairment or language barriers
NO — Patient CANNOT self-report
Why not? Determine the reason:
Infant or preverbal child (< 3 years)?
- FLACC Scale
- Five categories: Face, Legs, Activity, Cry, Consolability
- Each scored 0-2; total 0-10
- Observe for 1-5 minutes; score during and after procedures
- Also validated for children with developmental delays up to age 18
Nonverbal adult with dementia or cognitive impairment?
- PAINAD (Pain Assessment in Advanced Dementia)
- Five categories: breathing, negative vocalization, facial expression, body language, consolability
- Each scored 0-2; total 0-10
- Observe during caregiving activities (turning, bathing) — pain often emerges with movement
Intubated, sedated, or critically ill adult (ICU setting)?
- CPOT (Critical-Care Pain Observation Tool)
- Four categories: facial expression, body movements, muscle tension, ventilator compliance (or vocalization if extubated)
- Each scored 0-2; total 0-8
- Score ≥ 3 = significant pain; intervene and reassess
- Alternative: BPS (Behavioral Pain Scale)
- Three categories: facial expression, upper limb movements, ventilator compliance
- Scored 3-12; score ≥ 5 = unacceptable pain
- Used primarily in mechanically ventilated patients
Key rule at every decision point:
- Always attempt self-report first — even in cognitively impaired patients; many can use FACES or yes/no questions
- If self-report fails, choose the behavioral scale that matches the patient's age and clinical setting
- Never skip pain assessment because a patient "can't tell you" — behavioral cues ARE valid data
Clinical Pearl
Self-report first, always. No voice? Match the behavioral scale: FLACC for kids, CPOT for ICU, PAINAD for dementia.