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Table 4 Respiratory diseases and associated factors

From: Effect of household air pollution due to solid fuel combustion on childhood respiratory diseases in a semi urban population in Sri Lanka

Characteristics

Incidence of diseases

LRTI

Infection induced asthma

Asthma

Rhinitis

Incidence rate * 1000 (number of episodes/ months of observation)

Rate Ratio (95% CI)

Incidence rate * 1000 (number of episodes/ months of observation)

Rate Ratio (95% CI)

Incidence rate * 1000 (number of episodes/ months of observation)

Rate Ratio (95% CI)

Incidence rate * 1000 (number of episodes/ months of observation)

Rate Ratio (95% CI)

Cooking

 Inside living area

79.5 (141/1773)

0.94 (0.72–1.25)

51.3 (91/1773)

0.76 (0.55–1.06)

213.9 (379/1772)

0.98 (0.83–1.16)

232.9 (413/1773)

2.67 (2.11–3.40)

 Outside living area

84.3 (84/997)

67.2 (67/997)

218.5 (217/993)

87.3 (87/997)

Cooking hours

 Up to 2.5 h /day

72.8 (114/1565)

0.83 (0.63–1.08)

50.5 (79/1565)

0.79 (0.57–1.08)

219.0 (342/1562)

1.06 (0.90–1.25)

130.4 (204/1564)

0.81 (0.67–0.99)

 Greater than 2.5 h /day

88.0 (115/1307)

64.3 (84/1307)

206.6 (270/1307)

160.5 (209/1302)

Having an industry near home

 Yes

77.7 (102/1312)

0.97 (0.74–1.27)

51.8 (68/1312)

0.89 (0.64–1.23)

210.1 (275/1309)

0.95 (0.81–1.11)

174.8 (229/1310)

1.39 (1.15–1.69)

 No

79.9 (129/1614)

58.2 (94/1614)

222.1 (358/1612)

125.5 (202/1610)

Sex

 Male

77.6 (124/1598)

0.96 (0.74–1.25)

49.4 (79/1598)

0.79 (0.57–1.08)

230.9 (369/1598)

1.17 (1.00–1.37)

140.6 (224/1593)

0.93 (0.77–1.13)

 Female

80.7 (112/1388)

62.7 (87/1388)

197.4 (273/1383)

151.4 (210/1387)

Having a sibling

 Yes

84.0 (139/1655)

1.13 (0.87–1.49)

64.0 (106/1655)

1.38 (0.99–1.93)

223.2 (369/1653)

1.09 (0.93–1.28)

146.5 (242/1652)

0.99 (0.82–1.21)

 No

74.1 (96/1295)

46.3 (60/1295)

204.3 (264/1292)

147.1 (190/1292)

Attending to preschool

 Yes

74.8 (88/1177)

0.90 (0.68–1.18)

59.5 (70/1177)

1.10 (0.80–1.51)

213.3 (251/1177)

0.990 (0.84–1.16)

144.8 (170/1174)

0.98 (0.81–1.20)

 No

82.9 (147/1773)

54.1 (96/1773)

216.0 (383/1773)

147.5 (261/1770)

Having a pet

 Yes

76.1 (74/972)

0.93 (0.69–1.23)

53.5 (52/972)

0.89 (0.63–1.25)

225.3 (219/972)

1.08 (0.91–1.28)

135.8 (132/972)

1.03 (0.83–1.27)

 No

82.0 (153/1866)

60.0 (112/1866)

208.0 (387/1861)

132.3 (246/1860)

Family income

 Up to SLR 20,000

79.3 (55/694)

1.00 (0.73–1.36)

56.2 (39/694)

1.01 (0.69–1.46)

219.7 (152/692)

1.03 (0.85–1.23)

160.4 (111/692)

1.14 (0.91–1.41)

 Greater than SLR 20,000

79.0 (181/2292)

55.4 (127/2292)

214.1 (490/2289)

141.2 (323/2288)