Table 3 Environmental factors for tuberculosis: comparison of TB cases and clinic controls.

Electric or gas cooker

100

   Absent

159 (79.5)

86 (86%)

1.0

   Present

41 (20.5)

14 (14%)

0.60 (0.29–1.21)

0.15

Ceiling

100

   Yes

155 (77.5)

63 (63)

1.0

   No

45 (22.5)

37 (37)

2.08 (1.21–3.57)

0.008

2.27 (1.07–4.83)

0.032

Walls

100

   Cement

136 (68)

56 (56)

1.0

   Mud

4 (2)

11 (11)

5.92 (1.86–18.81)

0.003

4.52 (0.93–21.98)

0.062

   Mudbrick/other

60 (30)

33 (33)

1.30 (0.77–2.19)

0.33

0.83 (0.39–1.74)

0.62

Floor

100

   Earth

27 (13.5)

18 (18)

1.0

   Concrete/tiles

170 (85)

71 (71)

0.72 (0.39–1.37)

0.32

Number of windows

99

   0–1

60 (30.3)

29 (29.3)

1.0

   2–4

116 (58.5)

51 (51.5)

0.89 (0.51–1.54)

0.67

   >4

24 (12.1)

18 (18.2)

1.49 (0.69–3.23)

0.32

Occupation head of house

74

   Unemployed

18 (10.2)

10 (12.5)

0.55 (0.19–1.55)

0.26

   Unskilled worker

37 (21.0

10 (12.5)

1.0

   Skilled worker

18 (10.2)

3 (3.8)

0.96 (0.37–2.48)

0.94

   Professional

86 (48.8)

40 (50)

0.33 (0.07–1.46)

0.14

   Other

17 (9.7)

17 (21.3)

1.95 (0.63–5.96)

0.24

Crowding index

91

   1

44 (23.2)

10 (11.8)

1.0

   2

31 (16.4)

11 (12.9)

1.49 (0.54–4.09)

0.44

2.39(0.71–8.02)

0.16

   3

189 (60.3)

64 (75.3)

2.31 (1.05–5.12)

0.038

5.12 (1.82–14.38)

0.002

Household member had TB

100

   No/unsure

178 (89)

55 (55)

   yes

22 (11)

45 (45)

6.02 (3.23–11.25)

<0.0001

7.55 (3.43–16.6)

<0.0001