Table 6 Mean crestal bone loss (distal) one year after placement by study variables
Study variables (pts = number of patients, n = number of implants)a | Mean crestal bone loss distally (SD) mm | Unadjusted β (95% CI) p valueb | Adjusted β (95% CI) p valuec |
|---|---|---|---|
Gender | |||
 Male (pts = 152, n = 610) | 0.93 (0.85) | Ref | Ref |
 Female (pts = 302, n = 1063) | 0.82 (0.75) |  − 0.11 (− 0.23, − 0.00) |  − 0.08 (− 0.18, 0.01) |
p = 0.048 | p = 0.094 | ||
Age | |||
 20–40 (pts = 124, n = 332) | 0.74 (0.85) | Ref | Ref |
 41–60 (pts = 198, n = 751) | 0.80 (0.77) | 0.08 (− 0.06, 0.21) |  − 0.10 (− 0.20, 0.01) |
  > 60 (pts = 132, n = 590) | 0.99 (0.75) | 0.26 (0.18, 0.40) |  − 0.09 (− 0.21, 0.03) |
p < 0.001 | p = 0.168 | ||
Case type | |||
 Single crown (n = 780) | 0.36 (0.54) | Ref | Ref |
 FDP group (n = 893) | 1.29 (0.71) | 0.93 (0.87, 1.00) | 0.94 (0.87, 1.01) |
p < 0.001 | p < 0.001 | ||
Medical condition | |||
 No (pts = 291, n = 1031) | 0.78 (0.77) | Ref | Ref |
 Yes (pts = 163, n = 642) | 0.98 (0.80) | 0.18 (0.07, 0.29) | 0.08 (− 0.01, 0.17) |
p = 0.002 | p = 0.071 | ||
Smoking | |||
 No (pts = 396, n = 1482) | 0.87 (0.78) | Ref | Ref |
 Yes (pts = 58, n = 191) | 0.78 (0.87) |  − 0.03 (− 0.19, 0.14) |  − 0.08 (− 0.22, 0.06) |
p = 0.728 | p = 0.290 | ||
Implant abutment connection | |||
 Screw (n = 1607) | 0.86 (0.80) | Ref | Ref |
 Cement (n = 66) | 0.77 (0.56) |  − 0.03 (− 0.24, 0.18) | 0.05 (− 0.23, 0.12) |
p = 0.761 | p = 0.542 | ||
Implant position (sextant) | |||
 UR posterior (n = 347) | 0.91 (0.84) | Ref | Ref |
 Upper anterior (n = 176) | 0.87 (0.67) |  − 0.08 (− 0.22, 0.05) |  − 0.16 (− 0.28, − 0.05) |
 UL posterior (n = 277) | 0.83 (0.78) |  − 0.07 (− 0.19, 0.04) |  − 0.03 (− 0.12, 0.07) |
 LL posterior (n = 389) | 0.82 (0.83) |  − 0.06 (− 0.17, 0.05) |  − 0.06 (− 0.15, 0.03) |
 Lower anterior (n = 92) | 1.25 (0.80) | 0.22 (0.04, 0.39) | 0.05 (− 0.10, 0.20) |
 LR posterior (n = 392) | 0.76 (0.73) |  − 0.14 (− 0.24, 0.03) |  − 0.06 (− 0.15, 0.03) |
p = 0.002 | p = 0.065 | ||
Implant manufacturer | |||
 Ankylos (n = 1125) | 0.67 (0.51) | Ref | Ref |
 Astra (n = 51) | 0.88 (0.80) |  − 0.15 (− 0.40, 0.09) |  − 0.16 (− 0.36, 0.04) |
 Xive (n = 485) | 0.86 (0.79) | 0.08 (− 0.04, 0.19) | 0.06 (− 0.03, 0.15) |
 Frialit (n = 12) | 0.83 (0.83) |  − 0.10 (− 0.57, 0.38) |  − 0.06 (− 0.44, 0.33) |
p = 0.256 | p = 0.159 | ||
Operator | |||
 Maxillofacial (pts = 217, n = 854) | 0.89 (0.78) | Ref | Ref |
 Restorative (pts = 237, n = 819) | 0.82 (0.80) |  − 0.02 (− 0.09, 0.13) | 0.11 (0.02, 0.19) |
p = 0.729 | p = 0.017 | ||