Table 1

Table and schedule of assessments within CLASS II trial

Study period
EnrolmentAllocationPostallocationClose-out
Time pointsBaseline—t00Month 1—t1Month 2—t2Month 6—t3Month 12—t4Month 15—tx
Enrolment
Eligibility screenX
Parental consentX
Children's consentX
AllocationX
Interventions
Smoke-free interventionfx1
Controlsfx2
Assessments
Sociodemographic and medical history
 Personal detailsX
 Household detailsX
 Medical historyX
Smoking-related behaviours
 Smoking restrictionsXXXX
 Attitudes towards smokingXXXX
Health service useXXXX
Quality of lifeXXXX
Exposure to SHS—salivary cotinineXX
Lung healthXX
 Respiratory symptoms diaryXXXX
 Lung functions—spirometryXXXX
Academic assessment
 Academic performance questionnaireXXXX
 School absenteeism reportXXXX

  • CLASS, Children Learning About Secondhand Smoke; SHS, secondhand smoke.