Journal of the Medical Association of Thailand Vol 92, No 12:DECEMBER 2009 (SUPPL.7) 0125-2208 92 12 2009 Dec Substance-Dependence Rehab Treatment in Thailand: A Meta Analysis 100 EN Viroj Verachai Wirin Kittipichai Suwapat Konghom Lumsum Lukanapichonchut Narong Sinlapasacran Nipa Kimsongneun Prachern Rergarun Amawasee Doungnimit Original Article To synthesize the substance-dependence researches focusing on rehab treatment phase. Several criteria were used to select studies for meta analysis. Firstly, the researchmust have focused on the rehab period on the substance-dependence treatment, secondly, only quantitativeresearches that used statistics to calculate effect sizes were selected, and thirdly, all researches were from Thailibraries and were done during 1997-2006. The instrument used for data collection was comprised of two sets.The first used to collect the general information of studies including the crucial statistics and test statistics.The second was used to assess the quality of studies. Results from synthesizing 32 separate studies found that 323 effect sizes were computed in terms ofthe correlation coefficient “r”. The psychology approach rehab program was higher in effect size than thenetwork approach (p < 0.05). Additionally, Quasi-experimental studies were higher in effect size thancorrelation studies (p < 0.05). Among the quasi-experimental studies it was found that TCs revealed thehighest effect size (r = 0.76) Among the correlation studies, it was found that the motivation program revealedthe highest effect size (r = 0.84). The substance-use rehab treatment programs in Thailand which revealed the high effect sizeshould be adjusted to the current program. However, the narcotic studies which focus on the rehab phaseshould be synthesized every 5-10 years in order to integrate new concept into the development of futurethe substance-dependence rehab treatment program, especially those at the research unit of the DrugDependence Treatment Institute/Centers in Thailand. Narcotic Drug addict Substance-dependence Rehab treatment program Meta analysis