Fibromyalgia with psoriatic and rheumatoid arthritis: relationship with disease activity and serum vitamin D level

Egyptian Rheumatology and Rehabilitation

Table 1 Comparison between the studied group population as regard socio-demographic characteristics, serum vitamin D level, fibromyalgia frequency, and fibromyalgia score

Parameter		Rheumatoid arthritis N = 60		Psoriatic arthritis N = 30		Controls N = 40		P value
Parameter		No	%	No	%	No	%	P value
Gender	Females	43	71.7%	11	36.7%	26	65.0%	0.005
Gender	Males	17	28.3%	19	63.3%	14	35.0%	0.005
Age (years)	Mean + SD Median (interquartile range)	47.75 ± 11.11 48.50 (39_55)		44.17 ± 10.8 44 (36_50)		44.35 + 13.64 44(36_55)		0.2
Serum vitamin D level Mean + SD Median (IQR)		18.47 + 7.73 17.9 (12.95_23.8)		23.04 + 9.58 24.15 (17.90_31)		25.76 + 6.74 26.85 (20.45_30.75)		0.001
Fibromyalgia frequency	Absent	47	78.3%	26	86.7%	39	97.5%	0.025
Fibromyalgia frequency	Present	13	21.7%	4	13.3%	1	2.5%	0.025
Fibromyalgia score Mean + SD Median (IQR)		7 ± 5 6 (2–10)		4 ± 5 3 (0–7)		2 ± 3 0 (0–3)		< 0.009