Skip to main content
. Author manuscript; available in PMC: 2013 Aug 28.
Published in final edited form as: Epidemiology. 2011 Mar;22(2):10.1097/EDE.0b013e3182060ca5. doi: 10.1097/EDE.0b013e3182060ca5

Table 2. Transmission Probabilities Included in the Statistical Model With the Corresponding Epidemiologic Measures of Transmissibility.

Type of Transmission Transmission Group Time of the Day Time Perioda Transmission Probability Epidemiologic Measure
Person-to-Person Camp participants Day Camp period p1 R
Cabin mates Night Camp period p2 Night cabin SAR
Household members Day and night Household outbreak period p3 Household SAR
Cabin mates Day and night Camp period p4b Cabin-mate SAR
Community-to-personc Camp participants Day and night Camp period b1c
Camp participants Day and night Postcamp period b2
Household members Day and night Household outbreak period b3c
a

The camp period was 25–30 April; the postcamp period was 1–7 May; and the household outbreak period extended 10 days from the date of illness onset of the index case.

b

1 − p4 = (1 − p1)(1 − p2).

c

b1 and b3 are assumed to be equal to 0 for the primary analysis.

R indicates camp local reproductive number; SAR, secondary attack rate.