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Table 3 Cumulative survival risks by observation time

From: Implant survival and patient satisfaction in completely edentulous patients with immediate placement of implants: a retrospective study

Classification Time (month) n.riska Event CSR p-value 95% CI
Total 12 366 4 0.989 (0.979 1.000)
36 289 1 0.986 (0.975 0.998)
60 142 0 0.986 (0.975 0.998)
72 97 1 0.978 (0.957 0.999)
84 41 0 0.978 (0.957 0.999)
Loading type
 Immediate 12 157 2 0.987 0.72 (0.970 1.000)
36 122 0 0.987 (0.970 1.000)
60 64 0 0.987 (0.970 1.000)
72 44 1 0.968 (0.928 1.000)
84 19 0 0.968 (0.928 1.000)
 Delayed 12 209 2 0.991 (0.978 1.000)
36 167 1 0.986 (0.970 1.000)
60 78 0 0.986 (0.970 1.000)
72 53 0 0.986 (0.970 1.000)
84 22 0 0.986 (0.970 1.000)
Implant length
  < 12 mm 12 38 0 1.000 >  0.01 (1.000 1.000)
36 33 0 1.000 (1.000 1.000)
60 21 0 1.000 (1.000 1.000)
72 20 0 1.000 (1.000 1.000)
84 12 0 1.000 (1.000 1.000)
 10–12 mm 12 103 0 1.000 (1.000 1.000)
36 87 1 0.990 (0.972 1.000)
60 50 0 0.990 (0.972 1.000)
72 33 0 0.990 (0.972 1.000)
84 13 0 0.990 (0.972 1.000)
  > 10 mm 12 225 4 0.983 (0.966 1.000)
36 169 0 0.983 (0.966 1.000)
60 71 0 0.983 (0.966 1.000)
72 44 1 0.962 (0.919 1.000)
84 16 0 0.962 (0.919 1.000)
  1. an.risk refers to the number of implants at risk, CSR cumulative survival rate