Exposures | Indigenous children | Non-Indigenous high-risk children | Non-Indigenous standard risk children |
---|---|---|---|
Unadjusted HR (95% CI) | |||
Maternal age (years) | |||
<20 | 0.97 (0.78 to 1.20) | 0.92 (0.71 to 1.18) | 1.30 (1.18 to 1.44) |
20–24 | 1.01 (0.83 to 1.21) | 1.10 (0.71 to 1.18) | 1.25 (1.18 to 1.39) |
25–29 | Referent group17 | ||
30–34 | 0.96 (0.76 to 1.21) | 0.85 (0.76 to 0.96) | 0.90 (0.86 to 0.95) |
≥35 | 0.77 (0.57 to 1.05) | 0.86 (0.75 to 0.97) | 0.822 (0.77 to 0.87) |
Maternal smoking during pregnancy | 1.42 (1.23 to 1.65) | 1.46 (1.29 to 1.59) | 1.75 (1.66 to 1.83) |
Multiparity of the mother | 1.38 (1.18 to 1.63) | 1.96 (1.78 to 2.16) | 2.19 (2.09 to 2.29) |
IRSAD | |||
1 (most disadvantaged) | Referent group17 | ||
2 | 0.73 (0.58 to 0.91) | 0.72 (0.60 to 0.87) | 0.82 (0.76 to 0.89) |
3 | 0.72 (0.58 to 0.88) | 0.73 (0.62 to 0.86) | 0.86 (0.80 to 0.93) |
4 | 0.80 (0.55 to 1.15) | 0.70 (0.60 to 0.83) | 0.76 (0.70 to 0.81) |
5 (most advantaged) | 0.82 (0.56 to 1.2) | 0.61 (0.52 to 0.72) | 0.66 (0.62 to 0.71) |
Male sex | 1.2 (1.07 to 1.42) | 1.17 (1.07 to 1.28) | 1.35 (1.29 to 1.40) |
Plural birth | 1.05 (0.64 to 1.73) | 1.17 (1.05 to 1.30) | 1.50 (1.38 to 1.73) |
Normal vaginal birth | 0.95 (0.81 to 1.11) | 0.92 (0.84 to 1.01) | 1.13 (1.09 to 1.18) |
Requiring oxygen therapy after birth | 1.03 (0.89 to 1.24) | 1.16 (1.04 to 1.28) | 1.07 (1.01 to 1.14) |
Born during the first half of the RSV season | 1.65 (1.42 to 1.91) | 1.29 (1.17 to 1.42) | 1.52 (1.46 to 1.58) |
Adjusted HR (95% CI)* | |||
Maternal age (years) | |||
<20 | 1.15 (0.89 to 1.49) | 1.70 (1.54 to 1.89) | |
20–24 | 1.16 (1.00 to 1.34) | 1.30 (1.23 to 1.38) | |
25–29 | Referent group | ||
30–34 | 0.81 (0.72 to 0.92) | 0.84 (0.80 to 0.89) | |
≥35 | 0.77 (0.67 to 0.88) | 0.71 (0.67 to 0.75) | |
Maternal smoking during pregnancy† | 1.39 (1.20 to 1.61) | 1.26 (1.13 to 1.41) | 1.47 (1.40 to 1.55) |
Multiparity of the mother† | 1.35 (1.15 to 1.59) | 2.07 (1.87 to 2.30) | 2.36 (2.23 to 2.50) |
IRSAD† | |||
1 (most disadvantaged) | Referent group | ||
2 | 0.75 (0.60 to 0.94) | 0.71 (0.59 to 0.86) | 0.84 (0.77 to 0.91) |
3 | 0.75 (0.61 to 0.92) | 0.72 (0.61 to 0.85) | 0.89 (0.83 to 0.96) |
4 | 1.02 (0.81 to 1.27) | 0.77 (0.65 to 0.90) | 0.87 (0.81 to 0.94) |
5 (most advantaged) | 0.91 (0.63 to 1.32) | 0.74 (0.63 to 0.88) | 0.88 (0.82 to 0.95) |
Male sex† | 1.24 (1.07 to 1.43) | 1.19 (1.08 to 1.30) | 1.34 (1.29 to 1.40) |
Plural birth | 1.20 (1.07 to 1.35) | 1.47 (1.28 to 1.70) | |
Normal vaginal birth | 0.87 (0.79 to 0.96) | 0.90 (0.87 to 0.94) | |
Requiring oxygen therapy after birth | 1.14 (1.03 to 1.27) | 1.08 (1.03 to 1.15) | |
Born during the first half of the RSV season† | 1.63 (1.41 to 1.90) | 1.30 (1.18 to 1.44) | 1.35 (1.24 to 1.47) |
Birth during the first half of RSV season X multiparity of the mother | 1.17 (1.06 to 1.28) |
*Only factors that remained significant in the adjusted model are presented and factors that were significant for all the three subgroups of children are in bold.
†Factors with a p value <0.05 across all the subgroups in the adjusted model.
IRSAD, Indices of Relative Socioeconomic Advantage and Disadvantage; NSW, New South Wales; RSV, respiratory syncytial virus.