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Table 4 Description and mixed model (MIXED procedure) analysis for the time until the first contact [s] (TUFC) (original and logarithmic data) for different categorical influencing variables

From: Application of the voluntary human approach test on commercial pig fattening farms: a meaningful tool?

 Description (TUFC)Model (log (TUFC))
n
(# pens)
mean [s]std. dev.geo. Meanlower conf. Limitupper conf. LimitF-valueP-value
Group size
1 (1–12 pigs per pen)57812.513.37.14.814.52.720.0191
2 (13–20 pigs per pen)4528.29.64.73.18.6
3 (21–35 pigs per pen)3887.910.14.32.98.5
4 (36–50 pigs per pen)765.97.73.22.15.9
5 (51–100 pigs per pen)305.26.23.01.95.6
6 (>  100 pigs per pen)166.911.72.92.17.1
Feeding system
1 (dry feeding)2511.210.67.04.612.91.27>  0.05
2 (wet feeding)7479.111.05.03.310.0
3 (fully automatic liquid feeding with sensor)2996.98.34.02.67.2
4 (fully automatic liquid feeding without sensor)46911.913.26.64.513.8
Ventilation system
1 (aisle ventilation)61510.411.56.04.011.73.40.0025
2 (perforated air channel)4947.79.74.12.78.2
3 (diffuse fresh air system)4311.011.86.74.312.3
4 (high-velocity ventilation)17410.112.45.63.710.9
5 (slot ventilation)16111.013.95.33.712.8
6 (others)2012.313.68.04.811.8
7 (outside pens)338.19.34.83.08.1
Age group
1 (1st-6th fattening week)8429.411.05.23.510.30.3>  0.05
2 (7th–12th fattening week)6989.811.85.23.510.9
Control position of the caretaker pre-fattening period
1 (service corridor)138010.011.65.53.711.22.0>  0.05
2 (inside the pen)1315.68.23.12.05.2
3 (others/mixed)295.39.32.81.84.9
Control position of the caretaker middle/end- fattening period
1 (service corridor)14539.911.65.43.711.11.0>  0.05
2 (inside the pen)583.33.42.51.32.6
3 (others/mixed)295.39.32.81.84.9
Flooring type
1 (straw)97.39.03.82.68.50.1>  0.05
2 (fully slatted concrete flooring)13259.611.55.23.510.7
3 (partially slatted concrete flooring)2069.411.25.13.410.2
Time of day
1 (08:00–10:59)5769.711.15.53.610.80.5>  0.05
2 (11:00–13:59)4798.911.05.03.39.6
3 (14:00–16:59)38410.312.45.33.711.9
4 (17:00–19:59)489.113.04.33.09.8
  1. * study population: 1668 pig groups (pen) from 214 herds
  2. TUFC time [s] until the first contact (touching the observer) of a pig with the person in the pen