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Table 6 P-values, estimates, OR’s and 95% CI’s of the explanatory variables that came out statistically significant (Age when filmed and Milk allocation: Drinker bucket with teat) for both outcomes (play and non-nutritive sucking) throughout backward elimination where 11 other explanatory variables where excluded from the multivariable logistic regression model

From: The effect of age when group housed and other management factors on playing and non-nutritive sucking behaviour in dairy calves: a cross sectional observational study

Drop no P-value Estimate OR 95% CI P-value Estimate OR 95% CI
Play & Age when filmed Non–nutritive sucking & Milk allocation: Drinker bucket with teat
0 0.02 − 0.031 0.97 [0.94; 0.99] 0.37 − 1.374 0.25 [0.02; 1.9]
1 0.013 − 0.032 0.97 [0.94; 0.99] 0.36 − 1.398 0.25 [0.01; 2.12]
2 0.022 − 0.028 0.97 [0.95; 0.99] 0.37 − 1.349 0.26 [0.01; 1.91]
3 0.021 − 0.028 0.97 [0.95; 0.99] 0.39 − 1.253 0.29 [0.004; 2.36]
4 0.022 − 0.027 0.97 [0.95; 0.99] 0.33 − 1.376 0.26 [0.002; 1.79]
5 0.018 − 0.028 0.97 [0.95; 0.99] 0.29 − 1.479 0.23 [4.49e−07; 2.04]
6 0.017 − 0.029 0.97 [0.95; 0.99] 0.35 − 1.305 0.27 [5.24e−13; 2.39]
7 0.022 − 0.027 0.97 [0.95; 0.99] 0.27 − 1.517 0.22 [1.39e−37; 1.89]
8 0.024 − 0.026 0.97 [0.95; 0.99] 0.10 − 2.291 0.10 [2.85e−31; 0.81]
9 0.006 − 0.032 0.97 [0.95; 0.99] 0.06 − 2.564 0.08 [1.82e−33; 0.59]
10 0.008 − 0.032 0.97 [0.94; 0.99] 0.02 − 2.895 0.06 [7.90e−18; 0.28]
11 0.003 − 0.035 0.97 [0.93; 0.99]