Burden of post-herpetic neuralgia in a sample of UK residents aged 50 years or older: findings from the zoster quality of life (ZQOL) study

Table 3 PHN pain severity/interference (ZBPI) and HRQOL impact (SF-36 & EQ-5D): ZQOL ordinal least squares (OLS) regression analyses

Dependent variable	Significant predictor (Independent) variables	Beta	r²	P > [t]	95% CI	95% CI	Model
Dependent variable	Significant predictor (Independent) variables	Beta	r²	P > [t]	Lower	Upper	Adj R²
Zoster Brief Pain Inventory (ZBPI)
Pain severity	Analgesic level 2, 3	1.293	0.053	0.004	0.430	2.156	13.8%
	Age	0.056	0.043	0.008	0.015	0.098
	Length of time with formal diagnosis of PHN	0.008	0.032	0.023	0.001	0.015
Pain interference	ZBPI Worst pain	2.839	0.245	0.000	2.097	3.580	38.8%
	Analgesic level 2, 3	1.278	0.052	0.001	0.554	2.002
	Psychological/psychiatric disorder	1.005	0.030	0.009	0.253	1.758
Short-Form Health Survey 36 (SF-36)
Physical Component Summary (PCS)	Analgesic Level 2, 3	−4.578	0.042	0.009	−7.986	−1.170	12.4%
	Metabolic/endocrine disorder	−4.960	0.041	0.010	−8.719	−1.202
	Age	−0.203	0.034	0.018	−0.371	−0.035
Mental Component Summary (MCS)	ZBPI Worst pain	−7.947	0.086	0.000	−11.948	−3.946	23.1%
	Psychological/psychiatric disorder	−8.061	0.082	0.000	−12.226	−3.896
	Respiratory disorder	6.892	0.031	0.020	1.087	12.698
	Length of time with formal diagnosis of PHN	−0.034	0.025	0.035	−0.066	−0.002
	Body Mass Index (BMI)	0.423	0.024	0.039	0.022	0.825
EuroQoL 5-Dimensions (EQ-5D)
Self-Rated Health (SRH)	ZBPI Worst pain	−8.887	0.044	0.010	−15.577	−2.197	7.3%
Self-Rated Health (SRH)	Analgesic level 2, 3	−6.700	0.026	0.045	−13.237	−0.163	7.3%
Health State Index (HSI)	ZBPI Worst pain	−0.242	0.133	0.000	−0.337	−0.147	23.3%
	Psychological/psychiatric disorders	−0.141	0.042	0.005	−0.238	−0.043
	Analgesic level 2, 3	−0.115	0.031	0.016	−0.208	−0.022

ISSN: 1477-7525