In addition to the above primary-analysis, the age, height, and weight-adjusted mean differences between F and NF groups were evaluated separately in the baseline exercisers and sedentary control groups.
The participants were also divided into two groups by median of femoral neck BMD. The Cox proportional hazard regression model was used to calculate hazard ratio (HR) for lower vs. higher BMD-groups. Also, this analysis was adjusted for baseline age, height, and weight.
SPSS 25 statistical software (IBM Corp. Released 2017. IBM Statistics for Windows, Version 25.0. Armonk, NY: IBM Corp.) was used for all statistical analyses. P values were 2-sided and those less than 0.05 were considered statistically significant.