Table 1. Demographic characteristics of fibromyalgia patients and control subjects.

	Study	Control	P-values
Participant (n)	36	39
Gender (m/f)	30/6	33/6	0.879a
Age (years)	46.72±9.18	44.23±7.65	0.204b
Schirmer (mm/5 min)	16.11±3.96	15.31±3.70	0.367b
TBUT (s)	17.81±5.60	18.87±5.37	0.403b
OSDI	19.89±13.70	6.13±4.09	<0.001b
BCVA (logMAR)	0.0(0.0–0.2)	0.0(0.0–0.2)	0.486c

Abbreviations: BCVA, best corrected visual acuity; m/f, male/female; TBUT, tear break up time.

^aχ²-test.

^bStudent’s t-test.

^cMann–Whitney U-test.