Table 3. Clinical characteristics of acne vulgaris patients with and without fibromyalgia syndrome.

	Acne vulgaris patients (n=88)					Controls (n=76)
	n	%	Mean±SD	Median	Min.-Max.	n	%	Mean±SD	Median	Min.-Max.	p
Global acne score				9	4-20				13	3-31	0.334
Tender point counts				12	11-18				3	0-13	<0.001
Visual analog scale				6	2-10				1	0-9	<0.001
Widespread body pain	18	94.7				9	13				<0.001
Sleep disturbance	16	84.2				29	42				0.001
Fatigue	18	94.7				28	40.6				<0.001
Anxiety	15	78.9				17	24.6				<0.001
Anxiety score (HADS)	13	2-18				3	1-17				<0.001
Arthralgia	13	68.4				16	23.4				<0.001
Irritable bowel syndrome	6	31.6				8	11.6				0.045
Morning stiffness	2	10.5				2	2.9				0.202
Headache	13	68.4				22	31.9				0.005
Age			23.5±6.8					23.1±4.5			0.78
FMS: Fibromyalgia syndrome; SD: Standard deviation; Min.: Minimum; Max.: Maximum; HADS: Hospital anxiety and depression scale.