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Table 5 Summary statistics of outbreaks and incubation period within subgroups

From: Incubation period of typhoidal salmonellosis: a systematic review and meta-analysis of outbreaks and experimental studies occurring over the last century

  Count Sum of cases Median Mean (95% CI) Variance Skew Kurtosis Attack rate Vaccine
Subgroup 1 2 55 20 21.2 (19.5–22.9) 42.2 −0.002 −0.6 28.7 All or most cases
Subgroup 2 3 68 16 16.2 (14.6–17.8) 42.7 0.9 2.3 NR Unknown
Subgroup 3 2 276 9 10.8 (9.7–11.8) 39.7 2.1 4.4 54.1 None
Subgroup 4 2 107 8 9.7 (8.6–10.7) 29.3 1.8 2.9 67.6 Unknown
  1. NR Not reported