Table 1. Results of Tuberculosis Screening, Afghanistan 2010–2012.

	Year 1		Year 2			Total
Internally Displaced People	N	(%)	N	(%)	P-value	N	(%)
Total Screened	155,897		150,308			306,205	15.14%
People tested with SSM (%)	5,139	3.30%	3,697	2.46%	<0.001	8,836	2.89%
Total Smear Positive	358	0.23%	295	0.20%	0.045	653	0.2%
Yield	6.97%		7.98%		0.073	7.39%
NNS SS+	436		510			469
Total All Forms TB	389		346		0.003	735
NNS All Forms TB	401		434			417
Household Contacts	N	(%)	N	(%)	P-value	N	(%)
Total Screened	7,232		9,413			16,645	0.82%
People tested with SSM	1,480	20.46%	2,759	29.31%	<0.001	4,239	25.47%
Total Smear Positive	136	1.88%	132	1.40%	0.015	268	1.6%
Yield	9.19%		4.78%		<0.001	6.32%
NNS SS+	53		71			62
Total All Forms TB	158		146		<0.001	304
NNS All Forms TB	46		65			55
Health Facilities	N	(%)	N	(%)	P-value	N	(%)
Total Screened	889,120		810,157			1,699,277	84.03%
People tested with SSM	22,228	2.50%	24,535	3.03%	<0.001	46,763	2.75%
Total Smear Positive	1,986	0.22%	2,139	0.26%	<0.001	4,125	0.2%
Yield	8.93%		8.72%		0.410	8.82%
NNS SS+	448		379			412
Total All Forms TB	3,540		4,584		<0.001	8,124
NNS All Forms TB	251		177			209
All Strategies	N	(%)	N	(%)	P-value	N	(%)
Total Screened	1,052,249		969,878			2,022,127
People tested with SSM	28,847	2.74%	30,991	3.20%	<0.001	59,838	2.96%
Total Smear Positive	2,480	0.24%	2,566	0.26%	<0.001	5,046	0.25%
Yield	8.60%		8.28%		0.163	8.43%
NNS SS+	424		378			401
Total All Forms TB	4,087		5,076		<0.001	9,163
NNS All Forms	257		191			221

TB = Tuberculosis; NNS = Number needed to screen; SSM = Sputum smear microscopy; SS+ = Sputum smear-positive