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Table 2 Carriage prevalence per 100 children, overall and by vaccine-type and non-vaccine type, in 2015

From: Changes in pneumococcal carriage prevalence and factors associated with carriage in Norwegian children, four years after introduction of PCV13

Variable Number of carriers per subgroup Prevalence carriage, per 100 children [95%CI] Prevalence PCV7a carriage number; prevalence per 100 children [95%CI] Prevalence PCV13–7b carriage number; prevalence per 100 children [95%CI] Prevalence NVTc carriage number; prevalence per 100 children [95%CI]
Total 431 48.1 [43.7–52.5] 12; 1.3 [0.7–2.4] 13;1.5 [0.8–2.6] 412; 46.0 [41.5–50.5]
Age in months 431 included     
< 24 months 84 60.4 [52.2–68.1] 0; 0 [NA] 1; 0.72 [0.09–5.4] 84; 60.4 [52.2–68.1]
24–35 months 94 56.0 [48.1–63.6] 2; 1.2 [0.28–5.0] 1; 0.60 [0.08–4.4] 91; 54.2 [46.0–62.1]
36–47 months 105 53.9 [46.0–61.5] 4; 2.0 [0.61–6.7] 6; 3.0 [1.5–6.1] 98;50.3 [42.8–57.7]
48–59 months 89 42.8 [35.5–50.5] 2; 0.96 [0.25–3.6] 5; 2.4 [0.85–6.6] 84; 40.4 [33.0–48.3]
> = 60 months 59 31.7 [24.6–39.8] 4; 2.2 [0.83–5.5] 0; 0 [NA] 55; 29.6 [22.8–37.4]
Vaccinated by type 428 included     
PCV7 20 34.5 [22.9–48.3] 1; 1.7 [0.22–12.1] 0; 0 [NA] 19; 32.8 [21.1–47.0]
PCV7+13 52 30.1 [23.0–38.3] 2; 1.2 [0.28–4.7] 1; 0.58 [0.08–4.1] 49; 28.3 [21.7–36.9]
PCV13 354 54.5 [50.0–58.9] 8; 1.2 [0.54–2.8] 12; 1.9 [0.98–3.5] 340; 52.3 [47.7–56.9]
Unvaccinated 2 40.0 [11.1–78.0] 1; 20.0 [6.7–46.7] 0; 0 [NA] 1; 20.0 [6.7–46.7]
Having used antimicrobials the past 3 months 428 included     
Yes 28 40.6 [30.9–51.1] 0; 0 [NA] 0; 0 [NA] 28; 40.6 [30.9–51.1]
No 400 48.5 [44.0–53.1] 12; 1.5 [0.80–2.6] 12; 1.5 [0.78–2.7] 382; 46.4 [41.7–51.1]
  1. acarriage of serotypes covered by the 7-valent pneumococcal conjugate vaccine
  2. bcarriage of serotypes covered by the 13-valent pneumococcal conjugate vaccine but not by the 7-valent vaccine
  3. ccarriage of serotypes not covered by the 13-valent pneumococcal conjugate vaccine
  4. NA not applicable (the 95% could not be determined because  no children in this category carried these types)