Table 2

Comparison of variables between the study groups

	n	p A	p B	p C	p D	p E	%	Mean	Median	SD	IQR
Age		0.005	0.177	0.745	0.043	0.011
CLIFT−	139							51.9		20.0
CLIFT−/non-SLE	81							53.9		21.2
CLIFT−/newly diagnosed SLE	11							56.1		21.8
CLIFT−/previously diagnosed SLE	47							47.6		17.0
CLIFT+	83							44.8		16.5
ANA titre
CLIFT−	136	<0.001	0.546	0.285	0.137	<0.001			1/160		1/80–1/640
CLIFT−/non-SLE	79								1/160		1/80–1/640
CLIFT−/newly diagnosed SLE	11								1/320		1/160–1/640
CLIFT−/previously diagnosed SLE	46								1/160		1/160–1/320
CLIFT+	81								1/640		1/320–1/1280
dsDNA FEIA (IU)
CLIFT−	139	<0.001	0.133	0.583	0.089	<0.001			20		14–39
CLIFT−/non-SLE	81								18		13–33
CLIFT−/newly diagnosed SLE	11								21		15–29
CLIFT−/previously diagnosed SLE	47								26		15–49
CLIFT+	83								34		19–81
Sex (female)		0.849	0.144	0.095	0.069	0.256
CLIFT−	139						84.2
CLIFT−/non-SLE	81						85.2
CLIFT−/newly diagnosed SLE	11						63.6
CLIFT−/previously diagnosed SLE	47						87.2
CLIFT+	83						85.5
AC-1 ANA pattern		<0.001	0.894	0.934	0.074	0.004
CLIFT−	120						54.2
CLIFT−/non-SLE	68						55.9
CLIFT−/newly diagnosed SLE	11						54.5
CLIFT−/previously diagnosed SLE	41						51
CLIFT+	81						79

AC-1, ICAP nomenclature for the homogeneous ANA pattern; CLIFT, Crithidia luciliae indirect immunofluorescence test; dsDNA, double-stranded DNA; FEIA, fluorescence enzyme immunoassay; p A, p-value for the differences between the CLIFT-positive and -negative groups; p B, p-value for the differences between CLIFT-negative patients; p C, p-value for the differences between CLIFT-negative without SLE and CLIFT-negative newly diagnosed SLE; p D, p-value for the differences between CLIFT-positive SLE and CLIFT-negative newly diagnosed SLE; p E, p-value for the differences between the 4 study groups.