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Table 2 Activity prediction variables model for 2005–2009

From: Daily volume of cases in emergency call centers: construction and validation of a predictive model

Parameter

Estimatea

95% CI

Periodic function

0.55

NA

Year (long-term trend)

+ 7.10

(4.36 to 9.85)

Day of the week (Fridayb is reference)

 Monday

− 3.02

(− 14.16 to 8.13)

 Tuesday

− 14.62

(− 25.71 to − 3.54)

 Wednesday

− 5.75

(− 16.83 to 5.35)

 Thursday

+ 1.96

(− 9.14 to 13.07)

 Saturday

+ 251.75

(240.64 to 262.86)

 Sunday

+ 376.07

(364.96 to 387.19)

School and public holidays

 Public holiday

+ 295.03

(277.18 to 312.87)

 Christmas vacation

+ 89.05

(72.16 to 105.94)

 Winter vacation

+ 12.10

(− 6.25 to 30.46)

 Autumn vacation

− 3.81

(− 20.00 to 12.39)

 Summer vacation

− 4.44

(− 13.12 to 4.24)

 Winter vacation (Paris area)

− 8.23

(− 24.26 to 7.81)

 Spring vacation

− 15.83

(− 30.09 to − 1.57)

Epidemics

 Influenza incidence (within 100 ± cases / 100,000 inhabitants the previous week)c

+ 5.76

(4.08 to 7.45)

 Gastroenteritis incidence (within ± 100 cases /100,000 inhabitants the previous week)c

+ 4.74

(0.32 to 9.16)

  1. aRepresents the number of cases independently attributable to the variable in multivariate analysis
  2. bFriday was chosen as a reference because it is the median day in terms of activity
  3. cin the local administrative area, called a “département” in France, about the size of a county