A retrospective review of the two-step tuberculin skin test in dialysis patients

Table 1 Baseline characteristics stratified by TST results

Characteristic	Positive TST, 5 mm	Negative TST, 5 mm	P value	Positive TST, 10 mm	Negative TST, 10 mm	P value
Characteristic	n = 62	n = 421	P value	n = 45	n = 438	P value
Age (years)	61.2 ± 14.4	62.5 ± 16.6	0.57	63.7 ± 13.6	62.2 ± 16.6	0.57
Race			<0.01			<0.01
White	28.6 %	64.1 %		28.6 %	62.8 %
Non-white	71.4 %	35.9 %		71.4 %	37.2 %
BCG			0.1			0.15
Vaccinated	33.9 %	25.4 %		35.6 %	25.6 %
Not vaccinated	33.9 %	48.5 %		33.3 %	48.0 %
Unknown	32.3 %	26.1 %		31.1 %	26.5 %
Chest radiograph			0.82			0.57
Suggestive of TB	22.6 %	20.7 %		26.7 %	20.3 %
Not suggestive of TB	72.6 %	75.8 %		68.9 %	76.0 %
Not performed	4.8 %	3.6 %		4.4 %	3.7 %
Dialysis Center (HD only)			0.18			0.11
HSC	58.0 %	43.9 %		44.0 %	61.5 %
SOGH	18.0 %	25.2 %		25.2 %	15.4 %
SBGH	24.0 %	30.9 %		30.8 %	23.0 %
Peritoneal dialysis	19.4 %	21.1 %	0.75	13.3 %	21.7 %	0.19
Clinical diagnosis of LTBI (TB Registry)	16.1 %	1.2 %	<0.01	20.0 %	1.4 %	<0.01

Age presented as mean ± standard deviation, categorical variables presented as percentages
TST tuberculin skin test, BCG Bacillus Calmette-Guérin, TB tuberculosis, HSC Health Sciences Centre, SOGH Seven Oaks General Hospital, SBGH Saint Boniface General Hospital, LTBI latent tuberculosis infection

ISSN: 2054-3581