Table 3.

Fibromyalgia symptoms

	Cases	Referents	OR	95%CI	p
Constantly exhausted, %	89.0	34.7	10.67	5.78-19.69	< 0.0001
Whole body fatigue, %	91.9	36.9	16.31	7.84-33.93	< 0.0001
Only muscular fatigue, %	46.3	15.6	4.10	2.62-6.43	< 0.0001
Tender points, %	95.6	40.2	26.63	11.37-62.38	< 0.0001
Sense of stiffness, %	95.6	42.0	25.23	10.75-59.20	< 0.0001
Sense of bloating, %	72.1	22.1	6.30	3.81-10.43	< 0.0001
Numbness, pins and needles, %	77.2	26.4	5.48	3.27-9.19	< 0.0001
Wakes up not thoroughly rested, %	86.0	45.2	6.95	4.10-11.78	< 0.0001
Deteriorated short-term memory, %	73.5	28.9	4.66	2.86-7.59	< 0.0001
Daily pain, dull aching, %	94.9	24.4	31.33	13.82-71.03	< 0.0001
Pain at rest, %	94.9	27.9	26.26	11.61-59.40	< 0.0001
Awakened because of pain, %	83.8	19.4	13.15	7.47-23.13	< 0.0001

Prevalence of fibromyalgia symptoms among cases and referents. OR = odds ratios adjusted for the influence of age, body mass index, education, occupational and immigrant status, 95%CI = 95% confidence intervals.