Table 2.

Frequency of Detectable Anti-Hu Reactivity According to Covariate and Case-Control Status

Variable	Category	Anti-Hu Reactivity	Cases		Smoking Controls		Non-Smoking Controls
			N	%	N	%	N	%	p-value1
Total Population		Undetectable	14	34.2	21	53.9	24	61.5
		Detectable	27	65.9	18	46.2	15	38.5	0.01
Race	Caucasian	Undetectable	9	33.3	14	53.9	16	59.3
		Detectable	18	66.7	12	46.2	11	40.7	0.02
	African American	Undetectable	5	35.7	7	53.9	8	66.7
		Detectable	9	64.3	6	46.2	4	33.3	0.30
Gender	Male	Undetectable	6	20.0	12	60.0	12	54.6
		Detectable	15	80.0	8	40.0	10	45.5	0.02
	Female	Undetectable	8	40.0	9	47.4	12	70.6
		Detectable	12	60.0	10	52.6	5	29.4	0.21
Smoking Status	Former	Undetectable	2	25.0	3	42.9
		Detectable	6	75.0	4	57.1			0.662
	Current	Undetectable	12	36.4	18	56.3
		Detectable	21	63.6	14	43.7			0.142
Age (in years)	< 60	Undetectable	4	26.7	10	71.4	10	71.4
		Detectable	11	73.3	4	28.6	4	28.6	0.02
	60 – 69	Undetectable	8	40.0	9	42.9	13	65.0
		Detectable	12	60.0	12	57.1	7	35.0	0.11
	70 +	Undetectable	2	33.3	2	50.0	1	20.0
		Detectable	4	66.7	2	50.0	4	80.0	0.29

¹McNemar exact p-value for categorical data from cases and total matched controls (smoking and non-smoking)

²McNemar exact p-value for categorical smoking status from cases and matched smoking controls