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. 2018 Oct 29;9:2060. doi: 10.3389/fpsyg.2018.02060

Table 1.

Descriptive statistics of predictors tested.

n M or % SD Range
Individual factors
Demographic and biological variables
Sex (% boys) 555 52.8 1/2
SES (ISEI score) 520 62.9 15.5 17 to 89
Born preterm (% yes) 516 7.6 0/1
Body fat (mm)1 495 26.0 5.5 14.6 to 51.0
Fine motor skills (SDS) 495 0.1 1.0 −3.1 to 3.4
Pure motor (SDS) 461 0.1 1.2 −4.6 to 3.8
Associated movements (SDS) 429 −0.1 1.0 −3.3 to 3.0
Moderate to vigorous PA (min/day) 505 92.0 29.7 25.9 to 206.5
Psychological variables
Hyperactivity/inattention2 510 3.2 2.0 0 to 10
Peer problems2 511 1.2 1.4 0 to 6
Prosocial behavior2 511 7.7 1.7 2 to 10
Emotionality temperament3 511 2.8 0.7 1 to 5
Visual perception (SDS) 513 0.0 1.0 −2.7 to 2.5
EFs (T1, SDS)4 449 0.0 0.7 −2.2 to 1.6
Interpersonal factors
Parenting stress5 511 37.4 7.4 20 to 68
Positive parenting6 511 4.5 0.4 3.0 to 5.0
Inconsistent parenting6 511 2.5 0.5 1.0 to 4.2
Siblings (% yes) 552 67.8 0/1
Time outdoors (min/day) 507 144.1 87.5 0.0 to 480.0
Half days in childcare 548 5.5 2.6 0 to 10

Where no unit of measurement is indicated, scores refer to the corresponding questionnaire scale. 1Body fat is the sum of four skinfolds; 2Strength and Difficulties Questionnaire; 3Emotionality Activity Sociability Temperament Survey; 4EFs T1 is the mean of selective attention, self-regulation, and visuo-spatial working memory at T1; 5Parental Stress Scale; 6Alabama Parenting Questionnaire.