Table 3 Results of the forest plots for the bone formation grade at the 12-month follow-up

Number of patients with bone formation grade A at 12 months of follow-up

105

2

1.32

0.61, 2.86

0.48

0.49

0%

Random effect

Number of patients with bone formation grade B at 12 months of follow-up

105

2

1.13

0.46, 2.75

0.79

0.33

0%

Random effect

Number of patients with bone formation grade C at 12 months of follow-up

105

2

0.41

0.04, 4.20

0.45

0.07

71%

Random effect