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Table 2 Demographic Variables in the Two Study Groups

From: Infants hospitalized for Bordetella pertussis infection commonly have respiratory viral coinfections

Demographic variables

Pertussis

(N = 28)

Pertussis + Virus

(N = 25)

P Values

Boys

17 (60.7%)

17 (68%)

0.396*

Median age at hospitalization in days (range)

51.5 (17–102)

62 (22–109)

0.044

Gestational age in weeks (range)

39 (35–41)

39 (37–41)

0.105

Birth weight in Kg (range)

3.345 (1.940–4.450)

3.250 (2.500–4.100)

0.618

Cesarean section

10 (35.7%)

8 (32%)

0.503*

Breastfeeding at recovery

13 (46.4%)

19 (76%)

0.048*

Months breastfeeding

1.02 (0–2.14)

1.91 (0.27–3.58)

0.004

Presence of siblings

16 (57.1%)

19 (76%)

0.123*

Number of cohabitants ≥4

19 (67.9%)

22 (88%)

0.076*

Passive smoke

10 (35.7%)

11 (44%)

0.798*

Co-habitants with respiratory symptoms

21 (75%)

22 (88%)

0.197*

  1. *by χ-square test, by Mann-Whitney test