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Table 2 Measures collected at baseline from young people

From: Preventing substance misuse: study protocol for a randomised controlled trial of the Strengthening Families Programme 10–14 UK (SFP 10–14 UK)

Domain/question topic

Purpose

Measure/source

Personal information

Gender, school year, age, DOB, place of birth, ethnicity and cohabitants

DE

Adapted from general household survey [61]

Family affluence

DE

Family affluence scale [62, 63]

Substance use

Ever smoked?

CV

One question from substance initiation index [29]

Smoking status

CV

ASSIST study version of NatCen/NFER question [64]

Ever drunk a drink?

CV

NatCen/NFER [65]

Age of first drink?

CV

NatCen/NFER [65]

Frequency of drinking

CV

NatCen/NFER [65]

Ever little drunk?

CV

Adapted from HBSC questionnaire

Little drunk in last 3 months?

CV

Adapted from HBSC questionnaire

Ever really drunk?

CV

Adapted from HBSC questionnaire

Really drunk in last 3 months?

CV

Adapted from HBSC questionnaire

Ever taken drugs

CV

Adapted from HBSC / NatCen/NFER

Behaviour

Strengths and difficulties

CV

SDQ [66]

Aggressive and destructive conduct

CV

From Spoth, et al. [28]

Life at home

Things in your bedroom

CV

Adapted from young people, new media survey [67, 68]

TV, computer games, computer use

CV

From HBSC questionnaire

Free time activities

CV

Modified questions from west of Scotland twenty-07 study

Family functioning

CV

Family relationship index [69, 70]

Parenting/child management

CV

General child management, project family [71, 72]

Parents and school

CV

Three questions, one of which is adapted from the child rearing practices measure

Family activities

CV

From HBSC questionnaire/PEACH study

General health

Sleep – difficulties

CV

From HBSC questionnaire

Getting up/bedtimes

CV

From PEACH study

Health state today

CV, HE

EQ-5D [73]

General health

CV

Kidscreen 27 [74]

  1. Key: CV = Covariate; HE = Health Economics; DE = Demographics; IO = Immediate outcome; ST = Short term outcome; PO = Primary outcome; SO = Secondary outcome; TO = Tertiary outcome.