Participants and procedure
Women (n=200) with an increased risk of hereditary breast cancer who had participated in the previous prospective psychosocial studies between 1997 and 2010 at Karolinska University Hospital in Stockholm, Sweden [7,8] were invited to participate in the prospective long-term follow-up study 6–20 years after RRM and IBR [19]. Included were women with two different medical backgrounds: (i) previously asymptomatic women, and (ii) women who had previously been treated for breast cancer and underwent contralateral and/or complementary RRM and IBR after previous breast cancer surgery. The most common surgical technique used in RRM was skin-sparing mastectomy. Ninety-five percent of the patients had implant based reconstructions.
The women were asked to provide the name and address of their partner if they wanted their partner to be invited to the current study. Subsequently, invitation letters, including the questionnaires, and a return envelope, were sent to the partners. One reminder was sent after one month if no response was received. Both the partners and the women were informed that no disclosure of participation would occur and only paired respondents of women and partners were included in the analyses.
Instructions and instruments
The same set of questionnaires that the women had received were sent to the partners without any modifications. The partners were instructed from whose perspective they were to respond to the different parts of the questionnaires (Table 1):
From their perception of the women’s evaluation: The European Organisation for Research and Treatment of Cancer Breast Reconstruction Questionnaire (EORTC QLQ-BRR26), the Body Image Scale (BIS), and the Sexuality Activity Questionnaire (SAQ).
From their own perspective: The Hospital Anxiety and Depression (HAD) scale and the Swedish Short Form-36 Health Survey (SF-36).
The European Organisation for Research and Treatment of Cancer Breast Reconstruction Questionnaire (EORTC QLQ)-BRR26 assesses the satisfaction of results after breast reconstruction using 26 items. Scores range from 1 to 4 (“Not at all” to “Very much”). Validation and reliability tests have been performed in a set of breast cancer patients after breast reconstruction, including Swedish patients [20–22].
The Body Image Scale (BIS) evaluates the impact of surgery on physical and sexual attractiveness, femininity, satisfaction with body and scars, body integrity, self-consciousness, and avoidance behaviour after surgery for cancer patients [23]. For each item, the scores range from 0 to 3 (“Not at all” to “Very much”). Each patient receives a total BIS score between 0 and 30 (higher scores represent more problems).
Sexual Activity Questionnaire (SAQ) measures sexual activity in terms of “Pleasure” (desire, enjoyment, and satisfaction), “Discomfort” (dryness and pain), and “Sexual habit”. This 10-item scale has been shown to be a valid and reliable instrument for the assessment of women’s sexual functioning [24].
The Hospital Anxiety and Depression (HAD) scale assesses anxiety (7 items) and depressive symptoms (7 items), scored 0 to 3. The total score per scale ranges between 0 to 21, with clinical cases of either anxiety or depressive symptoms considered at ≥11 points, possible clinical cases at 8 to 10 points, and <8 points as within normal levels [25]. Validation of the Swedish HAD has been performed against breast cancer patient diaries [26].
Short Form (SF)-36 measures HRQoL using 36 items, constituting eight domains: “Physical functioning”, “Role physical”, “Role emotional”, “Bodily pain”, “General health”, “Social functioning”, “Vitality”, and “Mental health” [27]. Zero to 100 scales (higher scores represent higher functioning) were created based on the mean scores for each domain. The Swedish version has shown good psychometric properties, and normative data from the Swedish population are available for comparison [28].
Statistical analysis
Expected mean scale scores for the SF-36 scales were calculated using indirect standardisation with age and sex distributions from the study cohort and mean reference scores from the normative Swedish population [28]. Paired differences – between women and partners – were tested using the paired t-test. Results are presented as mean paired differences together with 95% confidence intervals. No adjustments were performed for multiple testing.