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Table 2 Contact prophylaxis offered to household contacts of children with iGAS disease notified to the PAEDS Network, Australia, 1 July 2016–30 June 2018

From: Invasive group A Streptococcus disease in Australian children: 2016 to 2018 – a descriptive cohort study

  Total patients (N) Patients with contact prophylaxis offered (n) Proportion of total patients with contact prophylaxis offered (%)a Risk ratio of offering contact prophylaxis (RR, 95% CI)b
Total 181 85 47.0
Gender
 Female 74 36 48.6 Ref
 Male 107 49 45.8 0.94 (0.69–1.29)
Hospital
 RCH 37 30 81.1 Ref
 MCH 24 14 58.3 0.72 (0.50–1.04)
 QCH 43 2 4.7 0.06 (0.01–0.22)
 WCH 22 15 68.2 0.84 (0.61–1.16)
 RDH 5 0 0.0 Not calculable
 PCH 27 20 74.1 0.91 (0.70–1.20)
 CHW 23 4 17.4 0.21 (0.09–0.53)
Disease severity
 Not severe 107 48 44.9 Ref
 Severe 74 37 50.0 1.11 (0.82–1.52)
Age group
 < 1 year 32 16 50.0 0.99 (0.66–1.48)
 1–4 years 83 42 50.6 Ref
 5–9 years 42 19 45.2 0.89 (0.60–1.33)
 10–14 years 21 6 28.6 0.56 (0.28–1.15)
 15–17 years 3 2 66.7 1.32 (0.57–3.02)
Indigenous Australian ethnicity
 Yes 21 8 38.1 0.79 (0.45–1.40)
 No/Don’t know 160 77 48.1 Ref
Patient with a household contacts aged < 10 years
 Yes 116 69 59.5 2.42 (1.54–3.79)
 No/Don’t know 65 16 24.6 Ref
Severe disease
 Yes 74 37 50.0 1.11 (0.82–1.52)
 No 107 48 44.9 Ref
  1. aDue to rounding, some totals will add to >100.0%
  2. bBold type indicates result is statistically significant
  3. RCH Royal Children’s Hospital Melbourne, Victoria; MCH Monash Children’s Hospital, Victoria; QCH Queensland Children’s Hospital, Queensland; WCH Women’s and Children’s Hospital, South Australia; RDH Royal Darwin Hospital, Northern Territory; PCH Perth Children’s Hospital, Western Australia; CHW Children’s Hospital at Westmead, New South Wales