Predictors of cardiopulmonary fitness in cancer-affected and -unaffected women with a pathogenic germline variant in the genes BRCA1/2 (LIBRE-1)

A Berling-Ernst, M Yahiaoui-Doktor, M Kiechle, C Engel, J Lammert, S Grill, R Dukatz, K Rhiem, F T Baumann, S C Bischoff, N Erickson, T Schmidt, U Niederberger, M Siniatchkin, M Halle, A Berling-Ernst, M Yahiaoui-Doktor, M Kiechle, C Engel, J Lammert, S Grill, R Dukatz, K Rhiem, F T Baumann, S C Bischoff, N Erickson, T Schmidt, U Niederberger, M Siniatchkin, M Halle

Abstract

Physical activity (PA) helps prevention and aftercare of sporadic breast cancer (BC), cardiopulmonary fitness (CPF) being an age-independent predictor of tumor-specific mortality. Therefore, we wanted to identify predictors of CPF (represented by peak oxygen uptake: VO2peak) in BRCA1/2 mutation carriers whose risk of developing BC is high. We used cross-sectional data from 68 BRCA1/2 germline mutation carrying women participating in the randomized, prospective, controlled clinical study LIBRE-1. Assessments included cardiopulmonary exercise testing, medical and lifestyle history plus socioeconomic status. Additionally, the participants completed a psychological questionnaire regarding their attitude, subjective norms, perceived behavior control and intention towards PA. A multivariate logistic regression model was used to identify predictors for participants reaching their age- and sex-adjusted VO2peak reference values. 22 participants (median age: 40 years, interquartile range (IQR) 33-46) were cancer-unaffected and 46 cancer-affected (median age: 44 years, IQR 35-50). The strongest predictor for reaching the reference VO2peak value was attitude towards PA (Odds Ratio 3.0; 95% Confidence Interval 1.3-8.4; p = 0.021). None of the other predictors showed a significant association. A positive attitude towards PA seems to be associated with VO2peak, which should be considered in developing therapeutic and preventive strategies.Trial registrations: NCT02087592; DRKS00005736.

Conflict of interest statement

The authors declare no competing interests.

© 2022. The Author(s).

Figures

Figure 1
Figure 1
Graphical abstract of the analysis. *LIBRE-1 Lifestyle Intervention study in women with hereditary BREast and ovarian Cancer, 1 = pilot; RCT randomized controlled trial; TPB theory of planned behavior, WSI Winkler-Stolzenberg-Index; *VO2peak reference values of the maximal oxygen uptake, OR odds ratio, CI confidence interval; y years. Pictures: miri019/shutterstock.com; leremy/shutterstock.com.

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