Table 2

Type of contact history and incidence of breakthrough varicella

Type of contactPatients (n)Breakthrough varicellaAdjusted OR (95% CI)
Household4717 19.89 (18.39 to 21.39)
Creche321 NS
Visiting180NS
  • Fifteen patients had more than one contact. Reference category of each case in the multiple logistic regression was the non-exposed (or no contact) group.