Table 2. Association between the prevalence of LTBI and risk factors in the prisoners studied bivariate and multivariate analysis (N = 352).

Characteristics	Response	QFT-GIT result		COR (95%CI)	AOR (95%CI)	P value of AOR
		Positive No (%)	Negative No (%)
Age in years	≤ 24	87(45.5)	104(54.5)	Ref.
	25–44	64(57.1)	48(42.9)	1.59(0.99–2.55)	1.68(0.93–3.03)	0.083
	≥45	29(64.4)	16(35.6)	2.17(1.11–4.25)	2.48(1.04–5.9)	0.041
Chewing khat	Yes	58(63.0)	34(37.0)	1.87(1.14–3.05)	2.27(1.27–4.19)	0.009
	No	122(47.7)	134(52.3)	Ref.
Length of staying months	≤12	89(45.2)	108(54.8)	Ref.
	>12	91(61.1)	58(38.9)	1.9(1.23–2.93)	1.81(1.04–3.18)	0.037
Number of prisoners per cell	≤100	40(42.6)	54(57.4)	Ref.
	>100	139(56.5)	107(43.5)	1.75(1.08–2.83)	1.91(1.002–3.65)	0.049
Sharing of utensils	Yes	142(56.3)	110(43.7)	1.8(1.1–2.92)	1.3(0.69–2.46)	0.409
	No	38(41.8)	53(58.2)	Ref.
TB contact history	Yes	121(56.5)	93(43.5)	1.65(1.07–2.55)	0.89(0.43–1.82)	0.752
	No	59(44.0)	75(56.0)	Ref.
Place of TB contact	Inside the prison	164(57.1)	123(42.9)	2.04(1.02–4.08)	2.32(0.94–5.75)	0.068
	Outside the prison	15(39.5)	23(60.5)	Ref.
Sharing cell with TB patient	Yes	112(56.9)	85(43.1)	1.58(1.02–2.45)	1.15(0.57–2.35)	0.695
	No	64(45.4)	77(54.6)	Ref.
Chronically coughing person in same cell	Yes	130(56.0)	102(44.0)	1.63(1.04–2.58)	1.01(0.52–1.97)	0.979
	No	49(43.8)	63(56.3)	Ref.
Health status	Sick	83(57.2)	64(42.8)	1.63(1.04–2.54)	1.28(0.74–2.21)	0.381
	Health	78(45.1)	95(54.9)	Ref.
BMI	<18.5	30(69.8)	13(30.2)	2.56(1.03–6.37)	2.27(0.68–7.59)	0.073
	18.5–24.99	131(49.6)	133(50.4)	1.09(0.55–2.16)	0.82(0.33–2.04)	0.184
	>25	18(47.4)	20(52.6)	Ref.

LTBI = Latent Tuberculosis Infection; COR = Crude Odds Ratio; ACO = Adjusted Odd Ratio; CI = Confidence Interval; QFT-GIT = Quantiferon®-TB Gold In-Tube; BMI = Body Mass Index