In a random assignment to each nominal group: the probability of being assigned to intervention or control is not dependent on pre-trial choice or preference and any other baseline patient characteristics.
Forty participants were randomly assigned to intervention or waitlist.
Another limitation might be heterogeneity in treating patients assigned to intervention.
Eligible participants were randomly assigned to intervention (Group D; n = 36) or control (Group C; n = 36).
Methods: Subjects who had left MMTP within the prior 12 months were randomly assigned to intervention or comparison groups.
Twelve patients were assigned to intervention (eight stenting or surgery and four tapering of antihypertensive medication) and 11 to standard treatment.
No differences in absolute CBF, CBV and OEF changes after 3 months were observed between patients assigned to intervention and those assigned to standard treatment (Table 2).
In a quasiexperimental design, six child-care centers were paired by size before being randomly assigned to intervention (n=3) and comparison (n=3) groups.
Of the 12 patients assigned to intervention (Figure 1), eight patients underwent stenting or surgery after a mean time of 15 ± 10 (range 1 to 29) days following the baseline PET scan.
Children aged 5 to 17 months who were not up to date (UTD) with recommended immunizations were identified and assigned to intervention (n = 294) or control groups (n = 309).
Mean absolute change, adjusted for age and sex, in CBF, CBV and OEF was compared between patients assigned to intervention and those who received standard treatment using linear regression analysis, and results were expressed as adjusted mean differences in change with 95% CI.
