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Table 1 Methodological advances of current SIBS trial relative to past sibling intervention trials

From: Group intervention for siblings and parents of children with chronic disorders (SIBS-RCT): study protocol for a randomized controlled trial

Documented limitationsa

SIBS study features

Few controlled trialsb

Randomized controlled design

Small sample sizes/insufficient power

A sample of 288 siblings based on power analysis

Unclear inclusion criteria

Child with ND enrolled in health services is the main inclusion criteria

Lack of standardized measures

Well-validated measures

Single raters only (most often parents)

Multi-informant (siblings, parents, teachers, clinicians, observers)

Cross-sectional/lack of follow-up data

Prospective with multiple assessment points up to 12 months post

No session description/protocol/manual

Detailed session-by-session manual

Unclear description of parent involvement

Parallel and joint parent component

No adherence data

Group leader adherence and competence measured

  1. aBased on reviews ([7] 17 studies and [8] 16 studies)
  2. bOne randomized controlled trial has been conducted (N = 21) [5]