The Increased Ratio of Blood CD56^bright NK to CD56^dim NK Is a Distinguishing Feature of Primary Sjögren’s Syndrome

Table 1

Overview of individuals at baseline used in this study.

	pSS	HC
Characteristics
Number	52	20
Age in years ()
Range	20-68	24-77
Female : male	49 : 3	19 : 1
Clinical features
ANA+ (%)	44 (84.6)	0 (0)
Ro/SSA+ (%)	44 (84.6)	NA
La/SSB+ (%)	23 (44.2)	NA
ESR, high levels (>20 mm/h) (%)	25 (48.1)	NA
CRP, high levels (>5 mg/l) (%)	7 (13.5)	NA
IgG, elevated levels (>16 g/l) (%)	26 (50)	NA
Focus (%)	42 (87.5)^a	NA
ESSDAI range (median)	0-15 (4)	NA

Categorical data are expressed as the absolute frequency, with percentages in parenthesis. ANA: antinuclear antibodies; Ro/SSA+: antibodies against Ro/Sjögren’s syndrome A antigen; La/SSB+: antibodies against La/Sjögren’s syndrome B antigen; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; focus score indicates the number of inflammatory foci containing more than 50 mononuclear cells per 4 mm² biopsy tissue. ESSDAI: EULAR Sjögren’s Syndrome Disease Activity Index; NA: not applicable. ^a.