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Journal of Clinical Oncology, Vol 25, No 25 (September 1), 2007: pp. 3823-3830
© 2007 American Society of Clinical Oncology.
DOI: 10.1200/JCO.2007.11.0437

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What Is the Psychological Impact of Mammographic Screening on Younger Women With a Family History of Breast Cancer? Findings From a Prospective Cohort Study by the PIMMS Management Group

Sally Tyndel, Joan Austoker, Bethan J. Henderson, Kate Brain, Clare Bankhead, Alison Clements, Eila K. Watson

From the Cancer Research UK, Primary Care Education Research Group, Division of Public Health, Primary Health Care, University of Oxford, Oxford; Institute of Medical & Social Care Research, Ardudwy, Normal Site, University of Wales, Bangor, Bangor, Gwynedd; and Institute of Medical Genetics, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom

Address reprint requests to Joan Austoker, PhD, Division of Public Health, Primary Health Care, University of Oxford, Old Road, Headington, Oxford OX3 7LF, United Kingdom; e-mail: joan.austoker{at}dphpc.ox.ac.uk


    ABSTRACT
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
Purpose: Studies are underway to establish the clinical effectiveness of annual mammographic screening in women younger than 50 years with a family history of breast cancer. This study investigated both the positive and negative psychological effects of screening on these women.

Patients and Methods: Women who received an immediate all-clear result after mammography (n = 1,174) and women who were recalled for additional tests before receiving an all-clear result (false positive; n = 112) completed questionnaires: 1 month before mammography, and 1 and 6 months after receiving final results. The questionnaires included measures of cancer worry, psychological consequences, and perceived benefits of breast screening.

Results: Women who received an immediate all-clear result experienced a decrease in cancer worry and negative psychological consequences immediately after the result, whereas women who were recalled for additional tests did not. By 6 months this cancer-specific distress had reduced significantly in both groups. Changes in levels of distress were significantly different between the two groups, but in absolute terms the differences were not large. Recalled women reported significantly greater positive psychological consequences of screening immediately after the result, and were also more positive about the benefits of screening compared with women who received an immediate all-clear result.

Conclusion: For women receiving an immediate all-clear result, participating in annual mammographic screening is psychologically beneficial. Furthermore, women who are recalled for additional tests do not appear to be harmed by screening: these women's positive views about mammography suggest that they view any distress caused by recall as an acceptable part of screening.


    INTRODUCTION
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
Breast cancer is the most common cancer in women in the United States and United Kingdom.1,2 Having a family history of breast cancer (FHBC) is one of the strongest risk factors for developing the disease.3 Guidelines recommend regular mammographic screening from age 40 years for women with an FHBC,4,5 although it is not yet known whether the benefits of regular screening for these women outweigh the harms.

For all women, one of the harms associated with having a mammogram is a false-positive screen resulting in additional imaging and biopsies.6,7 A recent systematic review of women in routine screening programs concluded that those who are recalled for additional tests experience significant anxiety in the short term and possibly long term.8 Given that the cumulative rate of having a false-positive screen for all women age 40 to 49 years ranges from 23% to 56%,7,9 potentially large numbers of women with an FHBC could receive a false-positive result.

Studies have found elevated levels of cancer-specific distress in women with an FHBC,10,11 although this group of women does not appear to experience increased levels of general psychological morbidity12,13 Risk factors for distress include age,14 education level,15 cancer experiences within the family,16 and risk perception.17 Given the greater cancer worry in women with an FHBC, it is possible they may be particularly adversely affected by a false-positive result. Previous studies have investigated the psychological impact of screening in women with an FHBC, but are hampered by their small sample sizes and study designs.18

This is the first large, prospective cohort study to examine both the positive and negative psychological impact of mammographic screening in women younger than age 50 who have regular screening because of an FHBC. We wished to test the hypothesis that in both the short and longer term, women who receive an immediate all-clear result gain psychological benefit from screening, whereas women who are recalled for additional tests before an all-clear result experience increased cancer-specific distress.


    PATIENTS AND METHODS
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
Participants
Women were invited to join the study if they were age 35 to 49 years and were already participating in (or had just been accepted onto) a 12- to 18-month screening program after assessment by specialist clinics as being at moderate or high risk of familial breast cancer. Women with a previous diagnosis of breast cancer or a family history of ovarian cancer only were excluded.

Participating clinics followed similar protocols. Women were referred to specialist family history/breast/genetics clinics by family physicians or hospital consultants. All referred women completed a family history questionnaire that was used to assess risk. Assessment into a moderate-risk category (lifetime risk of 17% to 30%) or high-risk category (lifetime risk of > 30%) was in broad agreement with United Kingdom National Institutes of Health and Clinical Excellence guidance.5 Women in both the moderate- and high-risk categories were offered regular mammograms and were counseled by a health professional from the specialist clinics. In addition, women at high-risk were offered specialist genetic counseling and could also be offered genetic testing or risk-reducing surgery.

This study was granted approval by London Multicenter Research Ethics Committee.

Procedures
Twenty-one centers throughout the United Kingdom participated in the study. Eligible women were identified by centers and sent questionnaires approximately 1 month before the scheduled mammogram appointment (T1). Where possible, centers sent a reminder to nonresponders at 2 weeks. At T1, 2,321 (62%) women completed the questionnaire and returned it directly to the research team, who sent out follow-up questionnaires approximately 1 (T2) and 6 months (T3) after women had received their final screening result. Nonresponders were sent one reminder at 2 weeks. At T2, 1,593 (80%) eligible women completed the questionnaire. Two hundred eight women who received an all-clear result were not sent follow-up questionnaires; initially, it was estimated that we only needed to follow up a random sample of one in three of the all-clear women. This decision was later revised to ensure we attained our target sample size. At T3, 1,436 (73%) eligible women completed the questionnaire. At T2 and T3, women were excluded if they completed the questionnaire more than 2 months or more than 8 months, respectively, after receipt of results, did not attend for a mammogram, or had a cancer diagnosis (Fig 1).


Figure 1
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Fig 1. Response to questionnaires. T1, 1 month before screening; T2, 1 month after final screening; T3, 6 months after final screening.

 
Final analyses were conducted on 1,286 (all-clear result, n = 1,174; recall, n = 112) women who completed all three questionnaires. This is in accordance with the study power calculation, which estimated that completed questionnaires from 1,000 women with an all-clear result and 110 questionnaires from women who were recalled were required to give 80% power to detect a difference of two points on the Psychological Consequences Questionnaire (PCQ).

Measures
The main study outcome, breast cancer–specific distress, was measured by the Revised Cancer Worries Scale (CWS-R)19-21and the PCQ.22

The six-item CWS-R assesses the frequency of concerns about developing cancer and the impact of these concerns on mood and daily functioning. It has been widely used and validated in populations at increased risk of cancer.23-25 Women were asked questions such as, "How often do you worry about developing breast cancer?" At T1 and T3, the questions related to the previous month; at T2, questions related to the period since receiving their final result. Items are scored from 1 (not at all or rarely) to 4 (almost all of the time), and summed for a total score (range, 6 to 24; T1, {alpha} = .84; T2, {alpha} = .82; T3, {alpha} = .80).

The PCQ measures negative (12 items) and positive (10 items) psychological consequences of breast screening in terms of emotional, physical, and social functioning. The negative PCQ, which has been widely used and validated in studies of routine breast screening programs,22,26,27 was administered at all three time points, with the same time anchor points as reported for the CWS-R. Women were asked questions such as, "As a result of thoughts about breast cancer, have you had trouble sleeping?" Items are scored from 0 (not at all) to 3 (quite a lot of the time). In previous studies the negative PCQ has been analyzed using subtotals,22 but also by using total scores.26 In the current study, factor analysis revealed one scale and the PCQ was summed for a total negative score (T1, {alpha} = .94; T2, {alpha} = .95; T3, {alpha} = .94), with a range of 0 to 36.

Secondary outcome measures were positive psychological consequences and perceived benefits of screening. The positive section of the PCQ was designed to be used after receipt of screening results,22 and was therefore administered at T2 and T3. Women were asked questions such as, "Have your experiences of breast screening (mammography) caused you to feel more hopeful about the future?" Positive items are summed for a total positive score (T2, {alpha} = .91; T3, {alpha} = .91), with a range of 0 to 30. After receiving their results, women were also asked whether their attitude about the benefits of breast screening had changed since their last visit. Response options were 1 (I now feel more positive), 2 (I feel the same), or 3 (I feel less positive). Data were dichotomized into two categories (I feel more positive and I feel the same/less positive), given that less than 1% of women felt less positive about screening.

Demographic information was collected at T1 and included age, marital status, race, educational level, and whether participants had biologic children. Screening clinics provided information on risk level (moderate or high), and whether this was the participants' first screen on the family history screening program. Data about previous mammograms and recall, details about the women's family history (deceased relatives, relatives currently receiving treatment for breast cancer), and time since they first realized that they were at increased risk of developing breast cancer (up to 1 year ago or > 1 year ago) were obtained from participants. Women were also asked to rate their perceived risk of developing breast cancer in their lifetime. Responses were collapsed into four categories: 1, no chance/unlikely; 2, likely; 3, highly likely/definitely; and 4, do not know.

Statistical Analysis
Characteristics of the two groups were compared using the {chi}2 test for categoric variables, with Yates continuity correction where appropriate. Age was compared using Mann-Whitney U test. Scores on the dependent variables (CWS-R, PCQ) were treated as continuous variables and paired-samples t tests were used for within-group comparisons of T1 versus T2 and T2 versus T3.

The negative psychological effect of recall at follow-up was examined using a random-effects linear regression model, with clinic center as the index variable and the between-group difference scores (calculated from T1-T2 and T2-T3) as the dependent variables. Covariates were included to adjust for scores on the psychological questionnaires at the relevant baselines (T1 or T2) and to control for potentially important variables. These variables were included based on significant prescreening differences between the recall and all-clear groups (Table 1) and background variables that were considered to be important potential predictors of cancer-specific distress (Table 2). Checks were made for any correlations between covariates, and preliminary analyses were performed to ensure that the assumptions required for regression were not violated. Given that the change scores on the PCQ were negatively skewed, a preliminary analysis was done using the Mann-Whitney U test to compare the effect of recall/all-clear result on the changes in negative psychological consequences. The data were then transformed using log 10 (score + 1).


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Table 1. Demographic, Screening History, Family History, and Risk Perception of Recalled and All-Clear Women

 

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Table 2. Linear Regression Analysis Showing Impact of Recall on Change in Cancer-Specific Distress

 
Positive psychological consequences were compared using the Mann Whitney U test. Benefits of screening were compared using {chi}2 test. Statistical analysis was conducted using SPSS version 12.0 (SPSS Inc, Chicago, IL).


    RESULTS
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
For the purpose of this analysis, the 1,286 women who completed all three questionnaires were divided into two groups. The all-clear group (n = 1,174) consisted of women given an immediate all-clear result. The recall group (n = 112) consisted of women recalled for additional tests as a result of the mammogram. Additional tests were one or more of the following: additional mammogram, ultrasound, clinical breast examination, fine-needle aspiration, core biopsy, or surgery to remove a benign tumor.

As listed in Table 1, the participant characteristics measured at T1 showed that women in the recall group were significantly more likely to be at high risk (P = .036) and to have biologic children (P = .027). Women in the recall group also had higher psychological scores prescreening on both main outcome measures (Fig 2).


Figure 2
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Fig 2. Mean scores on (A) Cancer Worry Scale (CWS) and (B) negative Psychological Consequences Questionnaire (PCQ) for recall and all-clear groups (with 95% CI).

 
Within-Group Comparisons
Examination of the within-group comparisons showed that there was a significant decrease in CWS-R and PCQ scores from the prescreening scores (T1) to postscreening results (T2) in the all-clear group, but there was no significant change between these time points in the recalled women (Table 3). However, at 6 months postscreening result (T3), both groups showed a significant decrease in scores for the two measures (Table 3). Scores across the three time points on the PCQ and CWS-R ranged from 0 to 27 (PCQ recall), 0 to 36 (PCQ all-clear result), 6 to 21 (CWS-R recall), and 6 to 23 (CWS-R all-clear result).


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Table 3. Comparison of Cancer-Specific Distress Within Groups at T1, T2, and T3

 
Between-Group Comparisons
After adjusting for potential confounders (listed as variables in Table 2), there were significant differences between the two groups in the magnitude of change from T1 to T2 and from T2 to T3 (Fig 2; Table 2). The all-clear group showed a reduction in CWS-R and negative PCQ scores in the period 1 month after screening, and the recall group showed the greatest reduction in scores in the following 6-month period.

Positive Psychological Impact
Table 4 shows the effect of recall on the positive PCQ at both follow-up time points. The recalled women had significantly higher scores at T2 compared with women with an all-clear result, but this difference had dissipated at the 6-month follow-up. Similarly, a higher proportion of women in the recalled group reported feeling more positive about the benefits of screening than women with an initial all-clear result after mammography. This difference between the groups persisted at 6 months.


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Table 4. Impact of Recall on Positive Outcomes at T2 and T3

 
Loss to Follow-Up
We had no information on nonresponders at T1, but were able to ascertain that nonresponders to one or more of the follow-up questionnaires reported greater levels of cancer-specific distress at T1 than responders. (CWS-R mean = 11.68, standard deviation [SD] = 3.35 v mean = 11.04, SD = 2.92; P = .000; PCQ mean = 7.05, SD = 8.41 v mean = 5.25, SD = 6.80; P = .000). Given that there were significantly more nonresponders in the all-clear group (43 v 32%; P = .006), a sensitivity analysis was done, using the assumption that nonresponders would have shown no change in psychological impact throughout the study. This analysis caused small changes in the P values but the differences between the groups remained highly significant. In addition, we conducted all analyses on T1 versus T2 using all women who had completed both questionnaires (n = 1,593; rather than restricting it to respondents who had completed all three questionnaires); this also made no difference in the findings.


    DISCUSSION
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
This study assessed both the positive and negative psychological impact of screening on women younger than age 50 years with an FHBC. It is interesting, and contrary to our expectations, that women who received a false-positive result did not show a statistically significant increase in cancer worry or negative psychological consequences after receiving their results. This differs from studies of women in the general population undergoing routine breast screening who have consistently reported significant adverse psychological consequences associated with a false-positive result 1 to 6 months after recall.15,26,28-30 One possible explanation is that women with an FHBC have different expectations of screening. Whereas women participating in routine screening have an expectation that screening will reassure them that "everything is all right,"31 and hence recall for additional tests challenges their health expectations,29 this may not be the case for women with an FHBC.

There were significant differences in magnitude of change for cancer worry and negative psychological consequences between women who received an immediate all-clear result and recalled women. However, the differences were small. The negative PCQ, which has been designed specifically to detect consequences of screening mammography, measured a mean change at T2 that could only be equated to a response of "rarely" instead of "not at all" to one of 12 questions. However, even small changes in cancer worry or negative psychological consequences may be important within the context of an already heightened anxiety. The levels of cancer worry found in this study are similar to those reported in other studies in similar populations,11,23,24 and are higher than those found in a general-population sample (CWS-R mean = 8.9, SD = 2.0).11 However, neither of the measures used in the study are clinical measures, and it has been suggested that when there are no clinical case thresholds available, measures of breast cancer worry in women with FHBC may simply be reflecting understandable concerns about risk status.11,13

It has been reported that women with an FHBC place a high value on access to regular mammography,32,33 and once offered the opportunity, are highly motivated to attend.34 To add to the understanding of the psychological impact of mammography on women with an FHBC, we also measured positive psychological consequences. Women who were recalled reported significantly more positive psychological consequences after receiving their results than the all-clear group, although there was no difference between the groups at 6 months. Furthermore, similar to a study of routine mammography,35 being recalled for additional tests apparently enhanced women's belief in the benefits of screening. When women were asked if their attitude toward screening had changed after receipt of results, the women who were recalled were significantly more positive about the benefits of screening—an attitude that still remained at 6 months. One explanation may be relief at the positive outcome of the recall, particularly if they had expected the worst before screening because of their increased risk.36 This pattern of results suggests that women with an FHBC who are recalled for additional tests place great faith in mammography screening despite their experiences.

This study had several strengths compared with previous studies that have reported on this topic. The study was large and recruited women throughout the United Kingdom, from family history clinics that were operating in a broadly similar fashion, and according to United Kingdom National Institutes of Health and Clinical Excellence guidance on the management of women with an FHBC. The study also benefited from being prospective in nature, enabling us to account for differences in levels of cancer-specific distress that existed before screening. A limitation associated with conducting a prospective cohort study using postal questionnaires is the potential bias resulting from loss to follow-up, although sensitivity analysis indicated this was unlikely to affect the findings of this study. However, it is possible that nonresponders at baseline were either a much more distressed group or conversely a much less distressed group, which would limit the generalizability of our findings. Generalizability is limited further because of the site of the study (United Kingdom only), restricted age range, and lack of racial diversity of the participants. It would also have enhanced understanding of the course of the psychological impact if the recalled women had completed an additional questionnaire during the recall period. However, given the mode of operation of the clinics, this was not feasible. Finally, although the measures asked women to reflect on cancer-specific distress in the previous 4 weeks, it is possible that anticipation of screening increased levels of distress at the time the prescreening questionnaire was completed.

The efficacy of screening in women younger than age 50 years with an FHBC has not been proven and is currently being investigated by a large multicenter study in the United Kingdom.37 However, the indications are promising,38,39 and the results from the current study suggest that participating in annual mammography screening is psychologically beneficial to the majority of women who receive an immediate all-clear result. Furthermore, although the majority of women who are recalled for additional tests do not experience the immediate reduction in cancer-specific distress seen in the all-clear group, their positive views about mammographic screening would suggest they view any distress caused by recall as an acceptable part of screening. Nonetheless, the high scores reported by some individuals on the questionnaires suggest it is still important to identify subgroups of vulnerable women who may be especially prone to adverse emotional responses to screening.


    AUTHORS' DISCLOSURES OF POTENTIAL CONFLICTS OF INTEREST
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
The author(s) indicated no potential conflicts of interest.


    AUTHOR CONTRIBUTIONS
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
Conception and design: Sally Tyndel, Bethan J. Henderson, Kate Brain, Clare Bankhead, Alison Clements, Joan Austoker, Eila K. Watson

Collection and assembly of data: Sally Tyndel

Data analysis and interpretation: Sally Tyndel, Bethan J. Henderson, Kate Brain, Clare Bankhead, Alison Clements, Eila K. Watson

Manuscript writing: Sally Tyndel, Bethan J. Henderson, Kate Brain, Clare Bankhead, Alison Clements, Joan Austoker, Eila K. Watson

Final approval of manuscript: Sally Tyndel, Bethan J. Henderson, Kate Brain, Clare Bankhead, Alison Clements, Joan Austoker, Eila K. Watson


    Appendix
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
The following collaborating centers participated in this study: Nottingham City Hospital, Withington Hospital, Manchester; Breast Test Wales –North, South East, and South West; Wales, Medical Genetics –North, South East, and South West; Southend Hospital; Elizabeth Garrett Anderson Hospital, London; Countess of Chester; Frenchay Hospital, Bristol; Royal Hospital Haslar, Portsmouth; Royal Liverpool University Hospital; Royal Cornwall Hospital; Ninewells Hospital, Dundee; City and Sandwells Hospital, Birmingham; Mayday University Hospital, Croydon; Derby City Hospital; Royal Marsden, London; University Hospitals Coventry and Warwickshire. This study would not have been possible without the enthusiasm of a multidisciplinary team of doctors, nurses, administrative and secretarial staff based in these centers.


    ACKNOWLEDGMENTS
 
We thank all of the patients who took the time to complete our questionnaire; the collaborating centers for their help; Rafael Perera and Pat Yudkin for statistical advice; and Jenny Hood for administrative assistance. This article was written on behalf of the PIMMS Management Group including: Stephen Duffy, Wolfson College of Preventive Medicine, London; Gareth Evans, Dept of Clinical Genetics, St Mary's Hospital, Manchester; Hilary Fielder, Screening Services, Velindre NHS Trust, Wales; Jonathon Gray, Institute of Medical Genetics, University Hospital Wales; James Mackay, Institute of Child Health, London; and Douglas Macmillan, Professorial Unit of Surgery, University of Nottingham, United Kingdom.


    NOTES
 
Supported by Grant No. C73A2916 from Cancer Research UK.

Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article.


    REFERENCES
 TOP
 ABSTRACT
 INTRODUCTION
 PATIENTS AND METHODS
 RESULTS
 DISCUSSION
 AUTHORS' DISCLOSURES OF...
 AUTHOR CONTRIBUTIONS
 Appendix
 REFERENCES
 
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Submitted January 31, 2007; accepted June 14, 2007.




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The "Coming of Age" of Nonmammographic Screening for Breast Cancer
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