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Table 2 Associations of child and parent characteristics at Year 1 with the odds of child participation in the study in Year 4

From: Change in children’s physical activity and sedentary time between Year 1 and Year 4 of primary school in the B-PROACT1V cohort

Child Characteristic at Year 1 (Total N = 1,299) Child participated in Year 4
Odds ratio (95% CI)
Child gender Boy Reference
Girl 1.42 (1.07, 1.88)
BMI category Under/Normal weight Reference
Overweight 0.78 (0.55, 1.10)
Obese 0.63 (0.39, 1.03)
IMD score 0.99 (0.97, 1.01)
Number of siblings 0 Reference
1 1.26 (0.62, 2.53)
2 0.94 (0.47, 1.87)
3 or more 0.61 (0.26, 1.44)
Female parent responded No Reference
Yes 1.02 (0.82, 1.27)
Male parent responded No Reference
Yes 1.12 (0.87, 1.44)
Female parent age (years) 1.03 (0.99, 1.06)
Male parent age (years) 1.02 (0.99, 1.05)
Female parent BMI (kg/m2) 0.98 (0.95, 1.01)
Male parent BMI (kg/m2) 0.98 (0.93, 1.03)
Female parent ethnicity White British Reference
Other 0.82 (0.54, 1.25)
Male parent ethnicity White British Reference
Other 0.81 (0.49, 1.35)
Female parent employment status Not working Reference
Working full/part time or in full time education 1.12 (0.82, 1.52)
Male parent employment status Not working Reference
Working full/part time or in full time education 1.20 (0.53, 2.70)