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Table 1 List of risky behaviours and criteria used to define level of engagement

From: Adolescents’ engagement in multiple risk behaviours is associated with concussion

Risky behaviour

No engagement

Moderate engagement

High engagement

Frequency of bullying

None

1–3 times a month

≥ 1 a week

Physical fights in past year

None

1 fight

≥ 2 fights

Lifetime cigarette smoking

Never

1–29 day times

≥ 30 times

Current alternative tobacco products use

No

1 product

≥ 2 products

Frequency of alcohol consumption

Never for every type of alcoholic beverage

<  1 a month for any type of alcoholic beverage

≥ 1 a month for any type of alcoholic beverage

Number of alcoholic drinks per typical event*

Never drink

1 drink

≥ 2 drinks

Lifetime drunkenness*

Never

1 time

≥ 2 times

Frequency of binge drinking in past year*

Never

≤ 1 time a month

≥ 2 times a month

Lifetime illicit drug use*

Never for all drugs

Used any drug 1 time

Used ≥2 drugs or any drug ≥2 times

Lifetime cannabis use*

Never

1–5 times

≥ 6 times

Lifetime sexual history

No experience of sexual intercourse

Had sexual intercourse and always used contraception

Had sexual intercourse without contraception ≥1 time

Helmet use while riding bicycle

Never ride bike or always used helmet

Wore helmet sometimes or most of time

Never wore helmet

Caffeinated beverage consumption

Never

≤ 1 day week

≥ 2 days a week

  1. *not included in analysis of grade 6–8 students because items were not included in their survey