Efficacy and Safety of Botulinum Toxin A and Pulsed Radiofrequency on Postherpetic Neuralgia: A Randomized Clinical Trial

Table 2

Five-item questionnaires and scoring system used for the evaluation of quality of sleep.

	A	B	C	D
1. How would you describe the overall quality of your sleep during the last week?	Very bad	Rather bad	Rather good	Very good
2. How many nights during the last week did you feel you could not sleep because of pain?	7 nights	4–6 nights	1–3 nights	None
3. How many times was your night sleep interrupted because of pain during the last week?	≥5 times	3–4 times	1–2 times	None
4. How many hours of continuous night sleep did you experience during the last week?	1–2 h	3–4 h	5–6 h	7–8 h
5. How much time did you spend lying in bed before sleeping during the last week?	≥60 min	40–60 min	20–40 min	<20 min

Scoring system: A, 3 points; B, 2 points; C, 1 point; D, 0 point. Scoring deviation: 0 (min) to 15 (max), 0–5 points: good quality, 5–10: moderate quality, 10–15: bad quality.