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Table 1 Characteristics of RSV-hospitalized children (cases) versus controls

From: The association between climate, geography and respiratory syncitial virus hospitalizations among children in Ontario, Canada: a population-based study

Characteristics

Cases

N = 1670

Controls

N = 6680

Overall

N = 8350

P-value

Age at index date in months [(median, (IQR)]

4.0 (2.0–13.0)

4.0 (2.0–13.0)

4.0 (2.0–13.0)

1

Female [N, (%)]

649 (44.2%)

2596 (44.2%)

3245 (44.2%)

1

Number of live births per mother (mean ± SD)

2.5 ± 1.1

2.2 ± 1.0

2.2 ± 1.0

<.001

Neighbourhood Income quintile [N (%)]

 1 - lowest

351 (23.9%)

1205 (20.5%)

1556 (21.2%)

0.06

 2

265 (18.1%)

1160 (19.8%)

1425 (19.4%)

 

 3

307 (20.9%)

1260 (21.5%)

1567 (21.3%)

 

 4

315 (21.5%)

1272 (21.7%)

1587 (21.6%)

 

 5 - highest

230 (15.7%)

975 (16.6%)

1205 (16.4%)

 

Rural [N (%)]

158 (10.8%)

552 (9.4%)

710 (9.7%)

0.11

Distance to nearest acute care hospital in km (Mean ± SD)

6.0 ± 6.3

5.9 ± 7.2

5.9 ± 7.0

0.49

Ecozones [N (%)]

 South

1396 (95.1%)

5597 (95.3%)

6993 (95.3%)

0.72

 Northa

72 (4.9%)

275 (4.7%)

347 (4.7%)

 

Annual AQHIb (Mean ± SD)

3.2 ± 0.3

3.2 ± 0.3

3.2 ± 0.3

<.001

Yearly mean of daily max NO2c (ppb)

(Mean ± SD)

19.5 ± 4.7

20.3 ± 4.9

20.1 ± 4.8

<.001

Yearly mean of daily max O3 (ppb)

(Mean ± SD)

39.9 ± 2.0

39.8 ± 1.8

39.8 ± 1.9

0.07

Yearly mean of daily max PM2.5c (μg/m3)

(Mean ± SD)

15.2 ± 1.9

15.2 ± 1.7

15.2 ± 1.7

0.37

Mean of minimum daily temperature during 7–13 prior to index date, (°C)

(Mean ± SD)

− 4.6 ± 4.8

− 2.4 ± 6.6

−2.8 ± 6.3

<.001

  1. IQR Interquartile range, SD Standard deviation, AQHI Air quality health index, ppb Parts per billion, μg/m3 Microgram per cubic metre, oC Degree Celsius
  2. aCombination of North Central/West and Northeast regions
  3. bLinked by census dissemination area = approximately 400–700 persons per neighbourhood
  4. cLinked by forward sortation area (FSA); Ontario is divided into 513 FSAs