Elsevier

Journal of Diabetes and its Complications

Volume 22, Issue 6, November–December 2008, Pages 400-407
Journal of Diabetes and its Complications

Original article
A longitudinal study of patients with diabetes and foot ulcers and their health-related quality of life: wound healing and quality-of-life changes

https://doi.org/10.1016/j.jdiacomp.2007.06.006Get rights and content

Abstract

Objective

The objectives of this study were to assess ulcer healing in patients with diabetic foot ulcers during a 1-year follow-up, to compare health-related quality of life (HRQL) between those with healing ulcers and those with ulceration, and to assess whether changes in healing affect patients' HRQL.

Methods

Data were collected at baseline, after 6 months (T2), and after 12 months (T3). Adult patients (n=127) with type 1 or type 2 diabetes and foot ulcers were recruited from outpatient clinics. Self-assessed HRQL was measured using the SF-36 Health Survey at all measurement points. Sociodemographic and clinical data were obtained at baseline, and data on healing, ulceration, and amputation were obtained at T2 and T3.

Results

Of 127 patients included at baseline, 35% had persistent ulcer, 37% had healed ulcer, 6% had undergone amputation, and 7% had died at T3. In addition, 9% had undergone amputation at T2. Significant differences were observed between patients with healed ulcers and patients with persistent ulcers on general health at baseline; on physical functioning, general health, and social functioning at T2; and on five of eight subscales in the SF-36 (e.g., physical functioning, role limitation—physical, general health, social functioning, and mental health) and on the physical summary score at T3. Furthermore, HRQL improved significantly in social functioning and mental health in parallel with healing of ulcers, and deteriorated in the social functioning subscale in parallel with nonhealing of ulcers.

Conclusions

Only 37% of ulcers healed during the 1-year follow-up. Poor HRQL during follow-up was associated with poor ulcer prognosis.

Introduction

Diabetic foot ulcers (DFUs) often fail to heal despite appropriate treatment and often become chronic (Jeffcoate, Price, & Harding, 2004). The shortest healing time is observed in neuropathic ulcers, compared with ulcers of ischemic or mixed etiology (Pound, Chipchase, Treece, Game, & Jeffcoate, 2005). Obviously, DFUs are highly heterogeneous, and comparing different ulcer populations is difficult. In one study, 31% of neuropathic ulcers had healed after 20 weeks of appropriate treatment (Margolis, Kantor, & Berlin, 1999). In another study, after 6 months of treatment, 48% of ulcers had healed, 40% of ulcers were unhealed, 3% of patients had lost a lower limb, and 6% had died (Jeffcoate & Harding, 2003). Boulton, Meneses, and Ennis (1999), using a multidisciplinary team and standard wound care approach, found that the majority of wounds (88%) healed.

Foot ulcers that last for >4 weeks are associated with the worst outcome and an increased risk of amputation (American Diabetes Association, nd, Jeffcoate et al., 2004). Patients with previous ulcers have a high risk for new ulcerations and further amputations, and have an increased mortality rate (Apelqvist, 1998). According to the American Diabetes Association's (1999) Consensus Development Conference on Diabetic Foot Wound Care, the incidence of ulcers at the same site or at different sites in a foot with prior ulceration is >50% over 2–5 years.

A number of studies have demonstrated that health-related quality of life (HRQL) is negatively affected by DFUs, and some of the studies have shown that patients with current foot ulcers rated their HRQL lower than did patients with healed ulcers (Goodridge et al., 2006, Nabuurs-Franssen et al., 2005, Tennvall & Apelqvist, 2000, Valensi et al., 2005). Furthermore, HRQL was lower for patients with a current ulcer compared with those with a minor amputation, but HRQL was still lower in those with a major amputation (Tennvall & Apelqvist, 2000).

Using the SF-36 Health Survey, a frequently used HRQL questionnaire (Ware, Kosinski, & Gandek, 2000), Meijer et al. (2001) found that the presence of DFUs had a great impact on physical health, and Ahroni and Boyko (2000) found that changes in foot ulcer status were significantly associated with changes in the SF-36 subscales of physical functioning and role limitation—physical. Only a few studies have prospectively investigated patients with DFU (Abetz et al., 2002, Nabuurs-Franssen et al., 2005). One study followed patients over a period of 3 months and noted higher HRQL scores in physical and social functionings in patients with healed ulcers compared with patients with unhealed ulcers (Nabuurs-Franssen et al., 2005).

The aims of the present study were as follows:

  • 1.

    To assess wound healing during a 1-year follow-up in patients with DFUs;

  • 2.

    To compare HRQL in these patients at baseline, and after 6 and 12 months of follow-up; and

  • 3.

    To assess whether wound healing is related to changes observed in patients' HRQL.

Section snippets

Methods

The study design was prospective and observational. A group of patients who were referred for DFUs and who received routine treatment for ulcers at six outpatient clinics in Oslo, Norway, was studied. Data were collected at baseline (T1), and at 6 months (T2) and 12 months (T3) after inclusion. The 6-month test point was chosen in order to compare clinical data with the data of previous studies (Jeffcoate & Harding, 2003). The 12-month follow-up was chosen to assess long-term development and

Sociodemographic and clinical characteristics of patients

The sociodemographic and clinical characteristics of the patients are given in Table 1. The mean age was 61 years (S.D.=13.8), and the majority of the patients were elderly, were obese men, were living alone, had low education, and were not on regular work at the time of inclusion (Ribu, Hanestad, Moum, Birkeland, & Rustoen, 2006). Of all the patients, 29% had type 1 diabetes, and the mean duration of diabetes was 19 years (S.D.=12.9). The patients' mean HbA1c level was 8.6 (S.D.=1.9); the mean

Conclusions

As far as we know, this is the first study to have examined HRQL in patients with DFUs over a period of 12 months and to have assessed their HRQL in relation to wound healing. Only 37% of the patients were ulcer-free 12 months after inclusion in the study, indicating the seriousness of DFUs in these patients. As previous studies have shown that patients with DFUs have a mortality risk that is more than double that of patients without DFUs (Boyko, Ahroni, Smith, & Davignon, 1996), our findings

Acknowledgment

This study was supported by Oslo University College (Oslo, Norway). The authors thank the patients, the nurses in diabetes clinics, and the hospitals for making this study possible. We wish to thank Reidun Mosand and Sissel Martinsen (Aker University Hospital); Anita Skafjeld and Kari Ihlen (Ulleval University Hospital); Elsa Orvik and Beate Sogaard (Asker and Baerum Hospital); Elisa Horntvedt Ellefsen (Diakonhjemmet Hospital); Anne-Kristin Bakkeli and Elisabeth Huseby (Lovisenberg Diakonale

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