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Studies of connective tissue from patients with inguinal hernia have shown that smoking may be associated with hernia formation due to a defective connective tissue metabolism. Whether smoking is a risk factor for recurrence, too, was examined in this study. From December 1990 through December 1995, 649 patients underwent hernia repair as open sutured repair (Cooper ligament or abdominal ring repair) or as open mesh repair. Five hundred forty-four eligible patients were evaluated for recurrence 2 years postoperatively. Association between recurrence and 17 patient-, disease-, and intraoperative variables were analyzed by multiple logistic regression. The results showed that smoking was significantly and independently associated with recurrence compared to nonsmoking [odds ratio (OR = 2.22; 95% confidence interval (95% CI) = 1.19-4.15)]. Open sutured repair compared to open mesh repair was the most significant predictor for recurrence (OR = 7.23; 95% CI = 3.01-17.37). Surprisingly, local anesthesia was associated with a higher risk of recurrence compared to general anesthesia (OR = 2.44; 95% CI = 1.19-5.09). Potential confounders and other risk factors for hernia recurrence such as age, alcohol consumption, previous surgery, and anatomical characteristics of the hernia were adjusted for in the analysis. In conclusion, smoking is an important risk factor for recurrence of groin hernia, presumably due to an abnormal connective tissue metabolism in smokers.

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In postgraduate medical education, required competencies are described in detail in existing competency frameworks. This study proposes an alternative strategy for competencybased medical education design, which is supported by change management theories. We demonstrate the value of allowing room for re-invention and creative adaptation of innovations. This new strategy was explored for the development of a new generic competency framework for a harmonised European curriculum in Obstetrics and Gynaecology. The generic competency framework was developed through action research. Data were collected by four European stakeholder groups (patients, nurses, midwives and hospital boards), using a variety of methods. Subsequently, the data were analysed further in consensus discussions with European specialists and trainees in Obstetrics and Gynaecology. These discussions ensured that the framework provides guidance, is specialty-specific, and that implementation in all European countries could be feasible. The presented generic competency framework identifies four domains: 'Patient-centred care', 'Teamwork', 'System-based practice' and 'Personal and professional development'. For each of these four domains, guiding competencies were defined. The new generic competency framework is supported by European specialists and trainees in Obstetrics and Gynaecology, as well as by their European stakeholders. According to change management theories, it seems vital to allow room for re-invention and creative adaptation of the competency framework by medical professionals. Therefore, the generic competency framework offers guidance rather than prescription. The presented strategy for competency framework development offers leads for implementation of competency-based medical education as well as for development of innovations in postgraduate medical education in general.