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Role and determinants of adherence to off-loading in diabetic foot ulcer healing: a prospective investigation

Role and determinants of adherence to off-loading in diabetic foot ulcer healing: a prospective investigation Role and determinants of adherence to off-loading in diabetic foot ulcer healing: a prospective investigation
Role and determinants of adherence to off-loading in diabetic foot ulcer healing: a prospective investigation Role and determinants of adherence to off-loading in diabetic foot ulcer healing: a prospective investigation

Studies indicate that off-loading adherence is low in patients with diabetic foot ulcers (DFUs), which may subsequently delay healing.

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Key take away

This research work constitutes the largest sample size in a series of studies depicting the association of diabetic foot ulcers healing with off-loading adherence. Also, it is the first to explore determinants of off-loading adherence in active diabetic foot ulcers patients.

Background

Studies indicate that off-loading adherence is low in patients with diabetic foot ulcers (DFUs), which may subsequently delay healing. However, there is little empirical evidence for this relationship or the factors that influence adherence.

Method

This prospective, multicenter, international study of 79 (46 from the U.K. and 33 the U.S.) persons with type 2 diabetes and plantar DFUs assessed the association between off-loading adherence and DFU healing over a 6-week period. Additionally, potential demographic, disease, and psychological determinants of adherence were examined. DFUs were offloaded with a removable device (77% a removable cast walker). Off-loading adherence was assessed objectively by activity monitors. Patient-reported measures included Hospital Anxiety and Depression Scale (HADS), Neuropathy and Foot Ulcer Quality of Life (NeuroQoL) instrument, and Revised Illness Perception Questionnaire (IPQ-R).

Result

Off-loading adherence was monitored for 35 6 10 days, and devices were used during 59 6 22% of subjects’ activity. In multivariate analyses, smaller baseline DFU size, U.K. study site, and better off-loading adherence predicted smaller DFU size at 6 weeks (P < 0.05). Better off-loading adherence was, in turn, predicted by larger and more severe baseline DFUs, more severe neuropathy, and NeuroQoL foot pain (P < 0.05). In contrast, greater NeuroQoL postural instability predicted worse off-loading adherence (P < 0.001). HADS and IPQ-R measures were not significantly associated with off-loading adherence.

Conclusion

Off-loading adherence is associated with the amount of DFU healing that occurs, while postural instability is a powerful predictor of nonadherence. Clinicians should take this neuropathic symptom into consideration when selecting an offloading device, as off-loading–induced postural instability may further contribute to nonadherence.

Source:

Diabetes Care

Article:

Role and Determinants of Adherence to Off-loading in Diabetic Foot Ulcer Healing: A Prospective Investigation

Authors:

Ryan T. Crews et al.

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