Stress levels predict substantial improvement in pain intensity after 10 to 12 years in women with fibromyalgia and chronic widespread pain: a cohort study

Table 4 Univariable logistic regression analyses of predictors of a reduction in FIQ pain ≥50% after 12 years. Odds ratios with 95% confidence intervals and p-values, adjusted for FIQ pain at baseline (n = 123^a)

Baseline values	Dependent variable ≥ 50% reduction in FIQ pain
Baseline values	OR (95% CI)	p-value
Age, per 10 years	1.00 (0.95–1.06)	0.85
Education, 1–4	0.97 (0.47–2.03)	0.95
Body Mass Index	0.95 (0.86–1.05)	0.32
FIQ total, per ten units	0.66 (0.45–0.96)	0.031
FIQ pain, per ten mm	1.19 (0.91–1.57)	0.21
HADS anxiety, 0–14	0.93 (0.84–1.03)	0.14
HADS depression, 0–14	0.85 (0.74–0.99)	0.030
SF-36 PCS, per ten units	0.70 (0.35–1.41)	0.31
SF-36 MCS, per ten units	1.87 (1.18–2.97)	0.008
SCI-93, per ten units	0.79 (0.64–0.98)	0.032
LTPAI, hours	0.97 (0.85–1.11)	0.67
6 min walk test, meter	1.00 (0.99–1-01)	0.97
Randomization in previous RCT	1.50 (0.57–3.99)	0.42

p-values less than 0.05 in bold
FIQ Fibromyalgia Impact Questionnaire, HADS Hospital Anxiety and Depression Scale, SF-36 Short-form 36, PCS Physical Component Summary, MCS Mental Component Summary, SCI-93 Stress and Crisis Inventory, LTPAI Leisure Time Physical Activity Instrument
^aData for 123 women were included in the analyses of improvement in pain intensity (FIQ pain), due to missing values. For HADS anxiety, HADS depression, SF-36 PCS, SF-36 MCS and SCI-93 the number of cases included in analyses were 120–122

ISSN: 2520-1026