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Table 1 Socio-demographic characteristics of index TB cases treated for TB between Nov 2010-Apr 2013) and relation to Incident TB among household contacts (treated for TB between Nov 2010-Apr 2015)

From: Yield of household contact investigation of patients with pulmonary tuberculosis in southern Ethiopia

Index case or household characteristicResponse# Index TB cases# of TB cases among HHCsaPerson years for HHCs (PY)TB incidence for HHCs per 100,000 PY (95% CI)Adjusted hazard ratiob (95% CI) for HHCsP valueb
AgeChildren < 1512 (3.49%)41472718 (1020–7242)10.288
Adults ≥15332 (96.51%)7345661599 (1271–2011)0.55 (0.18–1.65) 
GenderFemale149 (43.31%)3418961793 (1281–2510)10.619
Male195 (56.69%)4328171527 (1132–2058)0.89 (0.55–1.43) 
Marital statusSingle71 (20.64%)219652177 (1420–3339)10.207
Married273 (79.36%)5637491494 (1150–1941)0.71 (0.41–1.21) 
EducationIlliterate217 (63.08%)4230781365 (1009–1847)10.180
Elementary94 (27.33%)2711892270 (1557–3311)1.61 (0.97–2.69) 
High school or above33 (9.59%)84461793 (897–3585)1.32 (0.6–2.94) 
OccupationHousewife99 (28.78%)2412111982 (1328–2957)10.691
Farmer163 (47.38%)3424781372 (980–1920)0.72 (0.42–1.25) 
Daily laborer55 (15.99%)1871152 (162–8178)1.06 (0.53–2.88) 
Student6 (1.74%)157152099 (1266–3482)0.59 (0.08–4.66) 
Others21 (6.1%)32221348 (435–4181)0.72 (0.21–2.49) 
ReligionChristian307 (89.24%)7241851721 (1366–2168)10.591
Muslim33 (9.59%)54671072 (446–2575)0.61 (0.24–1.57) 
Others4 (1.16%)0620 
Family size< 5129 (37.5%)219522207 (1439–3384)10.262
5–8190 (55.23%)4830641567 (1181–2079)0.71 (0.41–1.21) 
> 825 (7.27%)86981146 (573–2292)0.52 (0.22–1.24) 
Total 344 (100%)7747131634 (1307–2043)  
  1. aHHCs Household contacts
  2. bAdjusted to clustering within household