Table 1

Baseline characteristics of participants

The study ID
(first author, year, country)		The effectiveness of the intervention in smoking preventionNumberAgeSex (females %)EthnicitySchool type (public %)Family income
Perry et al39 2009, IndiaEffective12 48411.948.4Not statedNot statedNot stated
Motamedi et al44 2016, South AfricaEffective561011–1251Black 9.5%, white 4.0%, mixed race (combination race of Asian, European and African descent) 85.8%Not statedNot stated but schools selected in a low income, densely populated urban area
Lotrean et al45 2013, RomaniaEffective107113–1551Not statedNot statedNot stated
Reddy et al40 2002, IndiaSchool interventionEffective575211.949.5Not stated40Not stated
School intervention plus family interventionEffective
Tahlil et al41 2015, IndonesiaIslamic-based interventionIneffective47711–1458.5Not statedNot statedNot stated
Health-based interventionIneffective
Combined health and Islamic-based interventionIneffective
Resnicow et al47 2010, South AfricaHarm managementIneffective52661449.5Black 59.7%, coloured 26.4%, white 9.9%100Not stated but findings were adjusted for income
Life skills interventionIneffective
Chou et al48 2006, ChinaIneffective266112.547.7Not statedNot statedNot stated
Seal38 2006, ThailandIneffective17015.511Not statedNot statedNot stated
Wen et al42 2010, ChinaIneffective234313.445.9Not stated50Not stated
Marsiglia et al43 2015, MexicoIneffective4311355Mexican100Not stated
Chen et al49 2014, ChinaIneffective180714.5±1.149.6Linzhi Tibetan and Guangzhou HanNot statedNot stated