Table 3

Post hoc analysis* of initial growth rates of cell lines established from donors of different ages

GroupInitial growth rateGroups comparedP
Fetal2.09  ±  0.34 (13)Fetal/young0.00008
Young1.11  ±  0.49 (23)Fetal/old0.0003
Old1.26  ±  0.53 (20)Young/old0.4
  • Total numbers of measurements are in parentheses. Initial growth rates (change in PDL per week) were determined in all lines and are presented as mean ± SD. Measurements were repeated in selected lines (chosen at random) from each age group to confirm sampling accuracy. 

  • * Total ANOVA, P = 0.0002.