Relations between the levels of moderate to vigorous physical activity, BMI, dietary habits, cognitive functions and attention problems in 8 to 9 years old pupils: network analysis (PACH Study)

Table 2 Centrality measures of variables in network structure for the whole sample

Variable				Network
Variable	Betweenness^a	Closeness^b	Strength^c	Expected influence^d
BMI, kg/m²	-0.96	-1.61	-1.27	-0.37
Light activities, min	0.65	0.25	0.17	-1.52
Moderate activities, min	-0.29	-0.06	0.42	-0.84
Vigorous activities, min	-0.96	-0.15	-0.78	0.48
Frequency of breakfast^e	-0.56	-0.12	-0.87	-0.34
Consumption of vegetables, portions/d	0.65	0.41	0.34	1.49
Consumption of fruits, portions/d	0.24	0.08	-0.31	1.63
Choice of positive snacks, number^f	-0.56	-0.56	-0.87	-0.65
Choice of negative snacks, number^g	0.51	0.09	0.16	0.15
Choice of sugar drinks^h	-0.96	-2.76	-1.82	-0.06
Eating in front of the screenⁱ	0.51	0.34	0.51	-0.12
Attention level	-0.96	-0.34	-0.97	-0.15
Motor speed, taps/10 s	-0.96	0.44	0.66	2.35
Processing speed, correct symbols/2 min	-0.16	0.43	0.82	0.06
Processing speed errors, incorrect symbols/2 min	2.79	1.53	2.05	-0.63
Executive functions, total correct responses	1.18	1.32	1.36	-0.51
Impulsivity, total incorrect responses	-0.16	0.71	0.39	-0.96

^aBetweenness—How well one node connects other nodes (the number of times that a node lies on the shortest path between two other nodes)
^bCloseness—How strongly a node is indirectly connected (average distance from the node to all other nodes in the network)
^cStrength—How strongly a node is directly connected (absolute sum of edge weights connected to a node)
^dExpected influence—the sum of all edges extending from a given node (maintaining the sign). Expected influence computes node strength without taking the absolute value of edge-weights
^e1—never; 2—sometimes; 3—almost every day; 4—every day
^fsum of nuts/dried fruits, fruits, yoghurt
^gsum of cookies, sweet bakery, salty nuts, French fries, popcorn, chips, chocolate, chocolate sweets, ice—cream
^h0—water; 1—tea; 2—soft drinks/sweetened juices
ⁱ1—no, 2—yes

ISSN: 1471-2458