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Table 1 Number and rate of presentations to emergency departments by ALRI diagnosis in Aboriginal and non-Aboriginal children aged <9 years

From: Can linked emergency department data help assess the out-of-hospital burden of acute lower respiratory infections? A population-based cohort study

Age group Number of presentations (rate*) Aboriginal vs non-Aboriginal
Aboriginal   Non-Aboriginal   IRR (95% CI)
Bronchiolitis       
<1 month 8 (29.2) 53 (7.3) 4.0 1.6, 8.4
1-5 months 348 (258.4) 2260 (63.0) 4.1 3.7, 4.6
6-11 months 334 (211.1) 2055 (48.2) 4.4 3.9, 4.9
12-23 months 110 (35.1) 707 (8.3) 4.2 3.4, 5.2
2-4 years <5 (0.4) 85 (0.3) 1.3 0.3, 3.4
5-9 years 0 - 5 (0.02) - -
Total 804 (34.8) 5165 (8.1) 4.3 4.0, 4.6
Croup       
<1 month <5 (3.7) <5 (0.1) 26.4 0.3, 2070.8
1-5 months 16 (11.9) 233 (6.5) 1.8 1.0, 3.0
6-11 months 53 (33.5) 944 (22.1) 1.5 1.1, 2.0
12-23 months 90 (28.7) 2020 (23.8) 1.2 1.0, 1.5
2-4 years 145 (15.7) 3593 (14.1) 1.1 0.9, 1.3
5-9 years 52 (7.0) 1158 (5.4) 1.3 1.0, 1.7
Total 357 (15.5) 7949 (12.5) 1.2 1.1, 1.4
Pneumonia       
<1 month <5 (11.0) 6 (0.8) 13.2 2.1, 61.8
1-5 months 30 (22.3) 101 (2.8) 7.9 5.1, 12.0
6-11 months 59 (37.3) 272 (6.4) 5.9 4.3, 7.8
12-23 months 92 (29.3) 926 (10.9) 2.7 2.2, 3.3
2-4 years 102 (11.0) 1216 (4.8) 2.3 1.9, 2.8
5-9 years 30 (4.0) 455 (2.1) 1.9 1.3, 2.7
Total 316 (13.7) 2976 (4.6) 2.9 2.6, 3.3
Total ALRI (N = 19016)†       
<1 month 12 (43.8) 64 (8.9) 5.0 2.4, 9.3
1-5 months 424 (314.8) 2731 (76.1) 4.1 3.7, 4.6
6-11 months 474 (299.5) 3460 (81.1) 3.7 3.4, 4.1
12-23 months 315 (100.4) 3995 (47.0) 2.1 1.9, 2.4
2-4 years 299 (32.3) 5333 (21.0) 1.5 1.4, 1.7
5-9 years 93 (12.4) 1816 (8.5) 1.5 1.2, 1.8
Total 1617 (70.1) 17,399 (27.3) 2.6 2.4, 2.7
  1. *rate per 1000 child-years at risk for Western Australian metropolitan live births 2001–2005.
  2. †Also includes 123 admissions for influenza (<5 Aboriginal, 121 non-Aboriginal); 94 for whooping cough (11 Aboriginal, 83 non-Aboriginal); 247 for bronchitis (19 Aboriginal, 228 non-Aboriginal) and 985 for unspecified ALRI (108 Aboriginal, 877 non-Aboriginal).