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. 2015 Apr 17;2015(4):CD004622. doi: 10.1002/14651858.CD004622.pub3

3. FMS versus control: change in CAL.

Tooth type: 
 Single‐rooted,
 Multi‐rooted,
 or Both Baseline pocket depth (mm) Time 
 (Months) Numberof studies (Participants) Mean difference 
 (Random‐effects meta‐analysis) Heterogeneity 
 (P value; I2)
Both 5‐6 3/4 4 (111) ‐0.02 [‐0.26, 0.23]; (P = 0.85) (P = 0.90); I² = 0%
Both > 6 3/4 5 (127) 0.09 [‐0.22, 0.41]; (P = 0.57) (P = 1.00); I² = 0%
Both 5‐6 6/8 4 (126) 0.09 [‐0.12, 0.30]; (P = 0.40) (P = 0.47); I² = 0%
Both > 6 6/8 4 (105) 0.05 [‐0.64, 0.74]; (P = 0.89) (P = 0.005); I² = 77%
Single‐rooted 5‐6 3/4 1 (16) 0.41 [‐0.00, 0.82]; (P = 0.05) Not applicable
Single‐rooted > 6 3/4 0 (0) Not estimable Not applicable
Single‐rooted 5‐6 6/8 2 (40) 0.04 [‐0.19, 0.27]; (P = 0.71) (P = 0.50); I² = 0%
Single‐rooted > 6 6/8 1 (24) 0.47 [‐0.37, 1.31]; (P = 0.27) Not applicable
Multi‐rooted 5‐6 3/4 1 (16) 1.11 [0.45, 1.77]; (P = 0.0009) Not applicable
Multi‐rooted > 6 3/4 0 (0) Not estimable Not applicable
Multi‐rooted 5‐6 6/8 2 (40) 0.00 [‐0.34, 0.34]; (P = 1.00) (P = 0.19); I² = 41%
Multi‐rooted > 6 6/8 1 (24) 0.38 [‐0.28, 1.04]; (P = 0.26) Not applicable