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Table 2 Streptococcus pyogenes isolated from school children in different age groups

From: Asymptomatic carriage of Streptococcus pyogenes among school children in Sana’a city, Yemen

Age groups S. pyogenes Negative culture for S. pyogenes Total χ2 P
No. % No. % No. %
5–8 years 28 14 175 86 203 25 0.73 0.69
9–12 years 50 13 329 87 379 46.6
> 12 years 26 11 205 89 231 28.4
Total 104 12.8 709 87.2 813 100
  1. χ2 = Chi square ≥ 3.84 is considered statistically significant
  2. P = probability value ≤ 0.05 is considered statistically significant