Table 4.

 Comparison of meta-analyses with and without clustered data

Comparison	Effect size all data (95% CI)	Effect size without clustered studies (95% CI)
Intervention v control:
Anxiety (after consultations)	−0.08 (−0.22 to 0.06)	−0.09 (−0.23 to 0.06)
Patients’ satisfaction	0.09 (0.03 to 0.16)	0.09 (0.02 to 0.16)
Consultation length	0.10 (−0.05 to 0.25)	0.05 (−0.08 to 0.18)
Written materials v coaching:
Coaching: satisfaction	0.23 (0.08 to 0.38)	0.18 (−0.03 to 0.39)
Written materials: consultation length	0.13 (0.05 to 0.21)	0.10 (0.02 to 0.18)
Clinicians’ training:
Trained: satisfaction	−0.01 (−0.15 to 0.12)	0.02 (−0.14 to 0.17)
Not trained: satisfaction	0.13 (0.05 to 0.21)	0.12 (0.03 to 0.20)
Not trained: consultation length	0.17 (0.10 to 0.24)	0.15 (0.07 to 0.22)