Key findings
Background
Methods
Participants
Measures
Health behaviour | Response Options | Recoded [13] |
---|---|---|
Dietary behaviours | ||
“How many times a week do you usually eat or drink …” | 7 categories “never”; “< once a week”; “once a week”; “2–4 days a week”; “5–6 days a week”; “once a day”; “every day, more than once | 3 categories <= once a week 2–6 days a week daily |
Fruits | ||
Vegetables | ||
Sweets | ||
Coke or other soft drinks | ||
Physical activity | ||
“Over the past 7 days, on how many days were you physically active for a total of at least 60 min per day?” | 8 categories 0–7 | 3 categories 0–2; 3–4; 5–7 |
Screen-based activities | ||
“About how many hours a day do you usually …” | 9 categories “None at all”; “About 1/2 h”; “About 1 h”; “About 2 h”; “About 3 h”; “About 4 h”; “About 5 h”; “About 6”; “About 7 or more.” | 3 categories <= 2 h 3–4 h > = 5 h |
Watch TV | ||
Play games | ||
Use a computer | ||
Substance use | ||
“Over the last 30 days, on how many occasions have you …” | 7 categories “never”, “once or twice”, “3–5 times”, “6–9 times”, “10–19 times”, “20–39 times”, “40 times”. | 3 categories Never Once or twice More than twice |
Smoked cigarettes | ||
Drunk alcohol | ||
Been drunk | ||
Taken marijuana |
Individual factors | Response Options | Recoded |
Age | Continuous | |
Height (self-report) | Body Mass Index | 2 categories Normal weight Overweight and obesity |
Weight (self-report) | ||
Contextual factors | ||
Family factors | ||
Family Affluence Scale | Sum = 0–9 | |
No. of cars | “No” (0); “One” (1); “Two or more” (2) | dichotomised High (3rd quantile) / Medium-low (1st and 2nd quantiles) |
Own bedroom | “No”(0), “Yes” (1) | |
Holiday with family | “Not at all” (0), “Once” (1), “Twice” (2), “More than twice” (3) | |
No. of computers at home | “None” (0), “One” (1), “Two” (2), “More than two”(3) | |
Family structure | ||
“Check all the people who live in the home where you live all or most of the time.” | “mother”, “father”, “stepmother”, “stepfather”, “grandmother”, “grandfather”, “I live in a foster home”, “other.” | dichotomised Living with both parents / Other family typology Ref: [10] |
Family communication | ||
“How easy it is to talk to the following persons about things that really bother you”. | “very easy”, “easy”, “difficult”, “very difficult”, “don’t have or see.” | dichotomised Good communication with both parents (or only parent) / Other Ref: [10] |
Mother | ||
father | ||
School factors | ||
School attachment | ||
“How do you feel about school at present.” | I like it a lot”, “I like it a bit”, “I don’t like it very much”, “I don’t like it at all”, | dichotomised Like / Dislike Ref: [10] |
Academic achievement | ||
“What does your class teacher(s) think about your school performance compared to your classmates”. | “very good”, “good”, “average”, “below average”, | dichotomised Good / Average or below |
Peers factors | ||
No. of evenings a week spent out with friends | 0–7 | |
Violent behaviour and victimisation | ||
How often / many times have you | dichotomised Yes / No | |
Taken part in bullying others in the last 2 months | “I haven’t”, “Once or twice”, “2 or 3 times a month”, “once a week”, “several times a week.” | |
Being bullied at school in the last 2 months | ||
Participated in a physical fight in the past 12 months | “I haven’t”, “One time”, “Two times”, “Three times”, “Four times or more.” |
Statistical analysis
Cluster analysis
Multinomial regression
Results
Characteristics of study subjects
n | n (%) | Missing (%) | |
---|---|---|---|
Agea | 4036 | 13,58 (3,50); 10,50-16,42a | 0 |
Gender | 4036 | 0 | |
Male | 1878 (46,5%) | ||
Female | 2158 (53,5%) | ||
Body Mass Index | 3777 | 6,4 | |
Normal weight | 2830 (74,9%) | ||
Overweight | 729 (19,3%) | ||
Obesity | 218 (5,8%) | ||
Family Affluence Scale | 3885 | 3,7 | |
High | 1591 (41,0%) | ||
Medium | 735 (18,9%) | ||
Low | 1559 (40,1%) | ||
Family Structure | 4036 | 0 | |
Living with both parents | 3135 (77,7%) | ||
Other family typology | 901 (22,3%) | ||
Family Communication | 3786 | 6,2 | |
Good communication | 2142 (56,6%) | ||
Mixed communication | 969 (25,6%) | ||
Poor communication | 675 (17,8%) | ||
Don’t have or see | 35 (0,9%) | ||
School Attachment | 4019 | 0,4 | |
Like | 3130 (77,9%) | ||
Dislike | 889 (22,1%) | ||
Academic Achievement | 4008 | 0,7 | |
Good | 1981 (49,4%) | ||
Average | 1831 (45,7%) | ||
Below average | 196 (4,9%) | ||
Evenings with friends (n° per week)a | 3938 | 0 (1); 0–7a | 2,4 |
Been Bullied last 2 months | 3991 | 1,1 | |
Never | 2498 (62,6%) | ||
Once or twice | 945 (23,4%) | ||
More than twice | 548 (13,6%) | ||
Bullied others last 2 months | 3987 | 1,2 | |
Never | 2719 (68,2%) | ||
Once or twice | 898 (22,5%) | ||
More than twice | 370 (9,3%) | ||
Participation in a fight last 12 months | 3956 | 2 | |
Never | 2876 (72,7%) | ||
Once or twice | 768 (19,4%) | ||
More than twice | 312,9%) |
Health behaviours
Behavioural item | ||||
---|---|---|---|---|
Dietary behaviours | n | once a week or less | 2 to 6 days/week | Daily |
Eat fruits, times/week | 4013 | 641 (15,97) | 1627 (40,54) | 1745 (43,48) |
Eat vegetables, times/week | 3998 | 975 (24,39) | 1921 (48,05) | 1102 (27,56) |
Eat sweets, times/week | 3999 | 1575 (39,38) | 1743 (43,59) | 681 (17,03) |
Drink soft drinks, times/week | 4000 | 1687 (42,18) | 1440 (36,00) | 873 (21,83) |
Physical activity | 2 days or less | 3 to 4 days | 5 days or more | |
60 min of physical activity last week, days | 3998 | 1505 (37,64) | 1287 (20,89) | 1206 (30,17) |
Screen-based activities | 2 h or less | 3 to 4 h | 5 h or more | |
Watching TV, hours/day | 3792 | 1340 (35,30) | 2012 (53,10) | 440 (11,60) |
Videogaming, hours/day | 3815 | 2608 (68,40) | 988 (25,90) | 219 (5,70) |
Computer use, hours/day | 3809 | 2208 (58,00) | 1300 (34,10) | 301 (7,90) |
Substance use | never | once or twice | more than twice | |
Smoked cigarettes last 30 days, times | 3995 | 3552 (88,91) | 219 (5,48) | 254 (6,36) |
Drunk alcohol last 30 days, times | 3976 | 2696 (67,81) | 865 (21,76) | 415 (10,44) |
Been drunk last 30 days, times | 3971 | 3690 (92,92) | 223 (5,62) | 58 (1,46) |
Cannabis use last 30 days, times | 3926 | 3833 (97,63) | 41 (1,04) | 52 (1,32) |
Cluster groups
Cluster characterisation
Association between individual and contextual factors and cluster membership
Variables (reference class) | Cluster Membership (reference cluster: Healthy) | ||||||
---|---|---|---|---|---|---|---|
OR (CI 95%) | Active Screen users | Substance users | Inactive low fruit and vegetable eaters | ||||
Age | Crude OR | 1,16 (1,10-1,22) | p< 0,001 | 1,87 (1,72-2,03) | p< 0,001 | 1,12 (1,07-1,19) | p< 0,001 |
a1 | 1,17 (1,11-1,24) | p = 0,002 | 1,89 (1,74-2,05) | p< 0,001 | 1,13 (1,07-1,19) | p< 0,001 | |
b | 1,10 (1,04-1,17) | p < 0,001 | 1,92 (1,74-2,12) | p< 0,001 | 1,09 (1,03-1,16) | p= 0,006 | |
Male gender (female) | Crude OR | 2,22 (1,09-1,69) | p= 0,003 | 1,69 (1,50-2,12) | p< 0,001 | 1,24 (0,67-1,97) | p= 0,002 |
a2 | 2,27 (1,89-2,72) | p= 0,004 | 1,86 (1,47-2,35) | p< 0,001 | 1,26 (1,05-1,52) | p = 0,013 | |
b | 2,15 (1,73-2,65) | p< 0,001 | 1,24 (0,94-1,64) | p = 0,131 | 1,39 (1,12-1,72) | p= 0,002 | |
Overweight/ obesity (normal weight) | Crude OR | 1,16 (0,94-1,43) | p = 0,171 | 0,94 (0,72-1,23) | p = 0,662 | 1,17 (0,94-1,44) | p = 0,152 |
Medium-to-low FAS (High) | Crude OR | 1,06 (0,87-1,26) | p = 0,534 | 0,97 (0,77-1,21) | p = 0,761 | 1,70 (1,40-2,04) | p< 0,001 |
a | 1,09 (0,91-1,30) | p = 0,372 | 0,97 (0,77-1,23) | p = 0,802 | 1,71 (1,42-2,06) | p< 0,001 | |
b | 0,98 (0,81-1,23) | p = 0,841 | 0,89 (0,68-1,16) | p = 0,382 | 1,54 (1,26-1,88) | p< 0,001 | |
Other family typology (living with both parents) | Crude OR | 1,27 (1,02-1,59) | p= 0,032 | 1,80 (1,38-2,33) | p< 0,001 | 1,29 (1,03-1,61) | p= 0,027 |
a | 1,27 (1,01-1,58) | p= 0,041 | 1,81 (1,38-2,39) | p< 0,001 | 1,29 (1,03-1,62) | p= 0,027 | |
b | 1,20 (0,93-1,53) | p = 0,149 | 1,54 (1,12-2,10) | p= 0,007 | 1,21 (0,95-1,55) | p = 0,127 | |
Poor or mixed family communication (good) | Crude OR | 1,33 (1,10-1,59) | p= 0,003 | 2,00 (1,56-2,52) | p< 0,001 | 1,40 (1,16-1,68) | p< 0,001 |
a | 1,48 (1,22-1,79) | p< 0,001 | 1,78 (1,39-2,27) | p< 0,001 | 1,40 (1,16-1,70) | p= 0,001 | |
b | 1,36 (1,11-1,67) | p= 0,003 | 1,45 (1,11-1,90) | p= 0,007 | 1,26 (1,03-1,54) | p= 0,028 | |
Dislike school (like) | Crude OR | 2,56 (2,01-3,25) | p< 0,001 | 4,25 (3,24-5,59) | p< 0,001 | 1,60 (1,25-2,07) | p< 0,001 |
a | 2,30 (1,81-2,94) | p< 0,001 | 3,70 (2,79-4,91) | p< 0,001 | 1,53 (1,18-1,97) | p= 0,001 | |
b | 1,88 (1,45-2,45) | p< 0,001 | 2,40(1,75-3,29) | p< 0,001 | 1,22 (0,92-1,61) | p = 0,172 | |
Average or below Academic Achievement (good) | Crude OR | 1,65 (1,38-1,97) | p< 0,001 | 2,36 (1,88-2,96) | p< 0,001 | 1,85 (1,55-2,21) | p< 0,001 |
a | 1,57 (1,31-1,88) | p< 0,001 | 1,94 (1,53-2,46) | p< 0,001 | 1,78 (1,48-2,14) | p< 0,001 | |
b | 1,37 (1,13-1,88) | p= 0,001 | 1,56 (1,19-2,03) | p= 0,001 | 1,62 (1,33-1,97) | p< 0,001 | |
Evenings with friends | Crude OR | 1,39 (1,22-1,46) | p< 0,001 | 1,73 (1,58-1,90) | p< 0,001 | 0,97 (0,88-1,08) | p = 0,581 |
a | 1,24 (1,13-1,34) | p< 0,001 | 1,63 (1,48-1,79) | p< 0,001 | 0,93 (0,84-1,03) | p = 0,165 | |
b | 1,17 (1,06-1,28) | p< 0,001 | 1,50 (1,35-1,67) | p< 0,001 | 0,92 (0,82-1,02) | p = 0,118 | |
Been bullied (no) | Crude OR | 1,44 (1,20-1,73) | p< 0,001 | 1,42 (1,13-1,80) | p= 0,003 | 1,18 (0,98-1,42) | p = 0,084 |
a | 1,36 (1,13-1,64) | p< 0,001 | 1,58 (1,25-2,03) | p< 0,001 | 1,18 (0,98-1,43) | p = 0,083 | |
b | – | – | – | ||||
Bullied others (no) | Crude OR | 1,95 (1,60-2,38) | p< 0,001 | 2,88 (2,27-3,65) | p< 0,001 | 1,29 (1,05-1,59) | p= 0,015 |
a | 1,81 (1,48-2,22) | p< 0,001 | 3,35 (2,59-4,32) | p< 0,001 | 1,29 (1,05-1,59) | p= 0,017 | |
b | 1,62 (1,29-2,03) | p< 0,001 | 2,27 (1,70-3,03) | p< 0,001 | 1,29 (1,03-1,64) | p = 0,058 | |
Participation in fights (no) | Crude OR | 1,61 (1,30-1,98) | p< 0,001 | 3,16 (2,48-4,04) | p< 0,001 | 0,98 (0,78-1,23) | p = 0,856 |
a | 1,34 (1,08-1,68) | p< 0,001 | 3,84 (2,93-5,04) | p< 0,001 | 0,98 (0,94-1,19) | p = 0,592 | |
b | 0,99 (0,76-1,26) | p = 0,906 | 2,43 (1,79-3,30) | p< 0,001 | 0,85 (0,65-1,10) | p = 0,218 |