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Table 1 The percentage changes in grey-scale values over six weeks

From: A comparison of mandibular and maxillary alveolar osteogenesis over six weeks: a radiological examination

  Grey-scale values Per Cent Change over Time
  Pre-operative Post-operativea Three weeksb Six weeksc Three to Six weeksd
Maxilla 98 ± 26 54 ± 19 4.3 ± 2.7 11.7 ± 8.0 8.0 ± 6.9
Mandible 72 ± 22 53 ± 18 8.9 ± 7.6 15.0 ± 8.1 12.5 ± 9.7
  1. aPost-operative change = (preoperative - postoperative) ÷ preoperative x 100.
  2. bThree weeks = (3 weeks - postoperative) ÷ preoperative x 100.
  3. cSix weeks = (6 weeks - postoperative) ÷ preoperative x 100.
  4. dThree/six weeks = (3/6 weeks - postoperative) ÷ preoperative x 100.
  5. Values are given as a mean ± 1SD.