Time period | Heel lifts group | Eccentric exercise group | ||

Weeks | Days† | % | Days† | % |

1–2 | 7 (6 to 7) | 94 | 6 (4 to 6) | 79 |

3–6 | 7 (7 to 7) | 87 | 5 (5 to 7) | 67 |

7–12 | 7 (6 to 7) | 91 | 5 (3 to 5) | 60 |

Days refers to the number of days per week the intervention was reported to be used over the time period.

*Percentage adherence was calculated as follows. For the heel lifts group, the number of days the heel lifts were worn was divided by 7 (ie, the maximum possible number of days per week the heel lifts could be worn) and multiplied by 100. For the eccentric exercise group, the number of days the eccentric exercise programme was performed was divided by 7 (ie, the maximum possible number of days per week the eccentric exercise programme could be performed) and multiplied by 100.

†Values are expressed as median (IQR), where IQR is expressed as Q1–Q3.