Table 1.

PA, screen time, and sleep duration data collected by means of the 4th COSI family form (COSI/WHO Europe round 4 2015–2017)

Questions	Answer options	Categorization of responses
Transportation to and from schoola How does your child usually get to and from school? Please tick one option that he or she uses the most	Walking or cycling; Motorized vehicles; A combination of walking/cycling and motorised vehicles	Walking or cycling; Motorized vehicles; A combination of walking/cycling and motorized vehicles
Time spent practising sportsb Is your child a member of one or more sports clubs or dancing courses (e.g., football, soccer, running, hockey, swimming, tennis, basketball, gymnastics, ballet, fitness, ballroom dancing)? Over a typical week (including weekends), how many hours does your child spend on sports and physical activities with these sport clubs or dancing courses?	Yes/No (if yes, continue to the next question) None; 1 h/week; 2 h/week; 3 h/week; 4 h/week; 5 h/week, 6 h/week; 7 h/week; 8 h/week, 9 h/week; 10 h/week; 11 h/week or more	No membership at sport/dancing clubs; 1–3 h a week spent on sports; 4 or more hours a week spent on sports
Time spent on actively/vigorously playingc In his/her free time, about how many hours per day is your child usually playing actively/vigorously (e.g., running and jumping outside, or moving and fitness games inside)? Please tick one box for weekdays and one box for weekend	Weekdays/Weekend; Not at all; Less than 1 h/day; About 1 h/day; About 2/day; About 3 or more hours/day	Not at all or less than 1 h/day; 1–2 h/day; More than 2 h/dayd
Time spent watching TV or using electronic devicese Outside school lessons, how much time does your child usually spend watching TV or using electronic devices such as a computer, tablet, or smartphone (not including moving or fitness games), either at home or outside the home (e.g., at an Internet cafe, game centre, etc.)? Please tick one for the weekdays and one for the weekend	Weekdays/Weekend; Not at all; − Number of hours/day	Not at all or less than 1 h/day; About 1 h/day; About 2 h/day; About 3 h/day or moref
Hours of sleep per nightg At what time does your child usually go to bed on school days (weekdays)? At what time does your child usually wake up on school days (weekdays)?	hour/minute; hour/minute	At least 9 h per night; At least 10 h per night; At least 11 h per night

COSI, Childhood Obesity Surveillance Initiative.

^aData on transportation to and from school was not available for Italy and San Marino.

^bFor France, Ireland, Italy, and San Marino, information about children's membership at sports/dancing clubs was available, but there was no data on time spent practising sports in these clubs.

^cData on time spent playing actively/vigorously were not collected in Estonia and France. In Italy and San Marino, only the information about children never playing or playing for < 1 h/day was available.

^dNumerical values are assigned to the items “playing actively/vigorously on a weekday” and “playing actively/vigorously on a weekend day,” enabling the conversion of this item to a numerical scale (“never” = 0; < 1 h/day = 0.5; about 1 h/day = 1; about 2 h/day = 2; about ≥3/day = 3). Usual play time per day is calculated weighing weekday (5/7) and weekend hours (2/7) accordingly.

^eData on time spent watching TV or using electronic devices was not available for Estonia and Ireland.

^fNumber of hours per day is calculated weighing weekday (5/7) and weekend hours (2/7) accordingly.

^gData on hours of sleep per night was not available for Estonia and France.