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Table 1 Classification Tree Variables.

From: Mining social mixing patterns for infectious disease models based on a two-day population survey in Belgium

Variables Code Abbreviation Tree Usage
Physical Contact 1 = 'yes';
2 = 'no'
touching 1*
Location 1 = 'home';
2 = 'work';
3 = 'school',
4 = 'transport';
5 = 'leisure';
6 = 'other-multiple'
location 1,2*,3,4
Frequency 1 = 'daily';
2 = 'weekly';
3 = 'monthly';
4 = 'few times a year';
5 = 'first time'
frequency 3*
Duration 1 = '0–5 min';
2 = '5–15 min';
3 = '15 min – 1 hour';
4 = '1–4 hours';
5 = '> 4 hours'
duration 4*
Age Contact Continuous agecon 1,2,3,4
Gender Contact 1 = 'male';
2 = 'female'
gencon 1,2,3,4
Age Participant Continuous agepar 1,2,3,4
Gender Participant 1 = 'male';
2 = 'female'
genpar 1,2,3,4
Occupation Participant 1 = 'working';
2 = 'retired';
3 = 'at home';
4 = 'unemployed/job seeking';
5 = 'in education';
6 = 'other'
occpar 1,2,3,4
Household Size Participant Household Size
(including participant)
hhsize 1,2,3,4
Region Brss = 'Brussels'
WlsG = 'Walloon region'
VlsG = 'Flanders'
region 1,2,3,4
Day of the Week 0 = 'Sunday';
1 = 'Monday';
2 = 'Tuesday';
3 = 'Wednesday';
4 = 'Thursday';
5 = 'Friday';
6 = 'Saturday'
dayofweek 1,2,3,4
Holiday Period 0 = 'no holiday period'
1 = 'holiday period';
holiday 1,2,3,4
  1. Variables used in classification tree analyses. 'Tree usage' refers to the use of the variables in the tree construction for tree 1: physical contact; 2: contact location; 3: contact frequency and 4: contact duration. '*' indicates that the variable was used as the response variable.