; and (II) utilized some form of control (such as an untreated group, a placebo group, or a wait list study). (iv) Supported practice A practice shall be considered to be a supported practice if— (I) the practice is superior to an appropriate comparison practice using conventional standards of statistical significance (in terms of demonstrated meaningful improvements in validated measures of important child and parent outcomes, such as mental health, substance abuse, and child safety and well-being), as established by the results or outcomes of at least one study that— (aa) was rated by an independent systematic review for the quality of the study design and execution and determined to be well-designed and well-executed; (bb) was a rigorous random-controlled trial (or, if not available, a study using a rigorous quasi-experimental research design); and (cc) was carried out in a usual care or practice setting; and (II) the study described in subclause (I) established that the practice has a sustained effect (when compared to a control group) for at least 6 months beyond the end of the treatment. (v) Well-supported practice A practice shall be considered to be a well-supported practice if— (I) the practice is superior to an appropriate comparison practice using conventional standards of statistical significance (in terms of demonstrated meaningful improvements in validated measures of important child and parent outcomes, such as mental health, substance abuse, and child safety and well-being), as established by the results or outcomes of at least two studies that— (aa) were rated by an independent systematic review for the quality of the study design and execution and determined to be well-designed and well-executed; (bb) were rigorous random-controlled trials (or, if not available, studies using a rigorous quasi-experimental research design); and (cc) were carried out in a usual care or practice setting