Table 1

Relationship between body mass index and mean age of patients undergoing total knee replacement

Normal weightOverweightObese class I & IIObese class IIIOne-way ANOVA
P (age)
N (%)AgeN (%)AgeN (%)AgeN (%)Age
Overall4 533 (11.05)71.70±9.4312 867 (31.37)69.81±9.0719 432 (47.37)67.22±8.344 191 (10.21)63.62±7.77 <0.0001
Male1 797 (9.9)71.77±9.756 808 (37.4)69.24±9.088 441 (46.4)66.63±8.271 149 (6.3)63.60±7.80 <0.0001
Female2 736 (12.0)71.66±9.426 059 (26.5)70.45±8.5610 991 (48.1)67.67±8.393 042 (13.3)63.63±8.27 <0.0001
  • Data are represented as mean±SD or number (percentage). Mean ages among four categories in each registry were significantly different at p<0.001 by post-hoc comparison.

  • ANOVA, analysis of variance.