Comparison 4. Decisional conflict.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Decisional conflict ‐ all studies	42		Mean Difference (IV, Random, 95% CI)	Subtotals only
1.1 Total decisional conflict score	38	8785	Mean Difference (IV, Random, 95% CI)	‐7.22 [‐9.12, ‐5.31]
1.2 Uninformed subscale	27	5707	Mean Difference (IV, Random, 95% CI)	‐9.28 [‐12.20, ‐6.36]
1.3 Unclear values subscale	23	5068	Mean Difference (IV, Random, 95% CI)	‐8.81 [‐11.99, ‐5.63]
1.4 Uncertainty subscale	28	6200	Mean Difference (IV, Random, 95% CI)	‐4.04 [‐6.27, ‐1.81]
1.5 Unsupported subscale	24	5214	Mean Difference (IV, Random, 95% CI)	‐6.27 [‐8.86, ‐3.68]
1.6 Ineffective choice subscale	24	5241	Mean Difference (IV, Random, 95% CI)	‐6.31 [‐8.93, ‐3.70]
2 Decisional conflict ‐ in consultation	6		Mean Difference (IV, Random, 95% CI)	Subtotals only
2.1 Uncertainty subscale	2	310	Mean Difference (IV, Random, 95% CI)	‐6.45 [‐18.29, 5.38]
2.2 Uninformed subscale	4	545	Mean Difference (IV, Random, 95% CI)	‐6.37 [‐14.58, 1.85]
2.3 Unclear values subscale	1	204	Mean Difference (IV, Random, 95% CI)	‐17.2 [‐23.77, ‐10.63]
2.4 Unsupported subscale	2	354	Mean Difference (IV, Random, 95% CI)	‐7.16 [‐13.28, ‐1.03]
2.5 Ineffective choice subscale	2	307	Mean Difference (IV, Random, 95% CI)	‐2.37 [‐7.31, 2.58]
2.6 Total decisional conflict score	5	735	Mean Difference (IV, Random, 95% CI)	‐6.46 [‐12.78, ‐0.14]
3 Decisional conflict ‐ in preparation for consultation	36		Mean Difference (IV, Random, 95% CI)	Subtotals only
3.1 Uncertainty subscale	26	5890	Mean Difference (IV, Random, 95% CI)	‐3.83 [‐6.12, ‐1.55]
3.2 Uninformed subscale	23	5162	Mean Difference (IV, Random, 95% CI)	‐9.81 [‐13.00, ‐6.61]
3.3 Unclear values subscale	22	4864	Mean Difference (IV, Random, 95% CI)	‐8.40 [‐11.59, ‐5.21]
3.4 Unsupported subscale	22	4860	Mean Difference (IV, Random, 95% CI)	‐6.18 [‐8.96, ‐3.40]
3.5 Ineffective choice subscale	22	4934	Mean Difference (IV, Random, 95% CI)	‐6.75 [‐9.59, ‐3.90]
3.6 Total decisional conflict score	33	8050	Mean Difference (IV, Random, 95% CI)	‐7.32 [‐9.35, ‐5.28]
4 Decisional conflict ‐ without studies having high risk of bias	39		Mean Difference (IV, Random, 95% CI)	Subtotals only
4.1 Uncertainty subscale	26	5809	Mean Difference (IV, Random, 95% CI)	‐4.53 [‐6.87, ‐2.18]
4.2 Uninformed subscale	25	5316	Mean Difference (IV, Random, 95% CI)	‐9.96 [‐13.13, ‐6.78]
4.3 Unclear values subscale	21	4677	Mean Difference (IV, Random, 95% CI)	‐9.55 [‐13.08, ‐6.02]
4.4 Unsupported subscale	22	4823	Mean Difference (IV, Random, 95% CI)	‐7.00 [‐9.76, ‐4.24]
4.5 Ineffective choice subscale	22	4850	Mean Difference (IV, Random, 95% CI)	‐6.97 [‐9.76, ‐4.18]
4.6 Total decisional conflict score	35	8240	Mean Difference (IV, Random, 95% CI)	‐7.81 [‐9.84, ‐5.77]