Table 4.

Coefficients for the relationship between natural space (total, parks and garden access) with SDQ domain scores, from models^a stratified by sex or educational attainment.

	Hyperactivity problems	Emotional problems	Peer problems	Conduct problems	Total difficulties	Prosocial behaviour
BOYS
Total (per IQRb increase)	0.03	−0.03	−0.01	0.04	0.03	0.03
Total × Age (per IQR)	−0.23	−0.12	0.02	0.17	−0.14	0.01
Total × Age2 (per IQR)	0.03	0.01	0.00	−0.02	0.03	0.00
Parks (per IQR increase)	−0.07	−0.03	−0.08**	−0.04	−0.22*	0.00
Parks × Age (per IQR)	0.38	−0.22	−0.33	−0.22	−0.39	0.36
Parks × Age2 (per IQR)	−0.04	0.02	0.03	0.02	0.04	−0.04
No garden access	0.40	0.11	0.29*	0.34*	1.18*	0.09
No garden access × Age	−1.09	0.96	0.47	1.09	1.19	−2.09
No garden access × Age2	0.16	−0.09	−0.04	−0.09	−0.03	0.21
GIRLS
Total (per IQR increase)	−0.15*	−0.05	−0.08*	−0.04	−0.31*	0.14**
Total × Age (per IQR)	0.89	0.59	−0.50	−0.29	0.66	0.00
Total × Age2 (per IQR)	−0.09	−0.06	0.05	0.03	−0.07	0.00
Parks (per IQR increase)	0.03	−0.02	0.02	0.00	0.03	0.00
Parks × Age (per IQR)	0.47	0.49	0.00	−0.25	0.72	0.50
Parks × Age2 (per IQR)	−0.05	−0.05	0.00	0.02	−0.08	−0.05
No garden access	0.65**	0.13	0.15	0.20	1.13*	0.12
No garden access × Age	1.19	0.32	0.49	−1.06	1.10	−2.04
No garden access × Age2	−0.13	−0.04	−0.04	0.09	−0.13	0.19
LOW EDUCATION HOUSEHOLDS
Total (per IQR increase)	−0.04	−0.06	−0.08*	−0.01	−0.18	0.06
Total × Age (per IQR)	0.80	0.59	−0.23	0.17	1.33	−0.12
Total × Age2 (per IQR)	−0.08	−0.06	0.02	−0.01	−0.13	0.01
Parks (per IQR increase)	−0.01	−0.04	−0.02	0.01	−0.06	−0.03
Parks × Age (per IQR)	0.41	0.06	−0.11	−0.18	0.20	0.61
Parks × Age2 (per IQR)	−0.05	0.00	0.01	0.02	−0.02	−0.06
No garden access	0.56**	0.11	0.19	0.26*	1.11**	0.09
No garden access × Age	−0.90	−0.13	−0.01	0.30	−0.76	−1.89
No garden access × Age2	0.11	0.02	0.01	−0.03	0.11	0.18
HIGH EDUCATION HOUSEHOLDS
Total (per IQR increase)	−0.07	−0.02	0.03	0.03	−0.03	0.12*
Total × Age (per IQR)	−0.63	−0.36	−0.28	−0.39	−1.68	0.21
Total × Age2 (per IQR)	0.07	0.04	0.03	0.04	0.18	−0.02
Parks (per IQR increase)	−0.04	−0.02	−0.05	−0.06	−0.17	0.05
Parks × Age (per IQR)	0.20	0.12	−0.34	−0.39	−0.43	0.15
Parks × Age2 (per IQR)	−0.02	−0.01	0.04	0.04	0.04	−0.02
No garden access	0.40	0.09	0.24	0.27	1.00	0.20
No garden access × Age	5.46	5.47*	3.41	1.16	15.81**	−3.98
No garden access × Age2	−0.56	−0.55*	−0.31	−0.11	−1.56*	0.37

^*0.01≤p < 0.05.

^**0.001≤p < 0.01.

^aAdjusted for age, age², sex, screen time, household educational attainment, household equivalised income, carer's mental health, and neighbourhood deprivation.

^bInterquartile ranges in percentage points were 16.2 for total and 6.8 for parks.