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Table 4 Duration of interval between penicillin injections as risk factor for throat colonization with BHS

From: Throat culture positivity rate and antibiotic susceptibility pattern of beta-hemolytic streptococci in children on secondary prophylaxis for rheumatic heart disease

Interval between antibiotic prophylaxis Culture positive Culture negative OR (95 % CI) p-value
<16 days (n = 98) 15 83 1  
17–21 days (n = 25) 5 20 1.4(0.5–4.3) 0.57
22–28 days (n = 50) 16 34 2.6(1.2–5.9) 0.02
≥29 days (n = 38) 15 23 3.6(1.5–8.5) 0.003
  1. CI confidence interval, OR odds ratio