Table 2.

Clinical Characteristics of Primary Varicella Illness Among 52 Cases With Invasive Group A Streptococcal Infection and 172 Controls With Uncomplicated Varicella

CharacteristicCases
(n = 52)
%
Controls (n = 172) %P Value
Duration of rash (d)
 ≤73343NS
 8–144339
 ≥1588
 Unknown1610
Total number of pox lesions
 <502726NS
 50–1003342
 >1004031
Mucosal involvement
 No2938NS
 Yes6961
 Unknown21
Duration of fever (days)*
 02733NS
 1–25248
 ≥32119
Mean maximum daily T*
 ≤37.0°C2733<.05
 37.1–38.2°C2336
 ≥38.3°C2915
 Unknown2115
Proportion of days with T >39.4°C*
 05463<.001
 1–32%415
 ≥33%238
 Unknown1915
Exposure to varicella
 Household4419<.001
 School/daycare3137
 Other/unknown2544
  • NS indicates not significant.

  • * Oral temperature includes the period from the day before appearance of the varicella rash through the index day.