Table 2.
Mean Appraisal Score* (Range) | Diseases in My Family | Experience of Relative’s Illness | Personal Models of Disease | Personalizing Risk | Control of Familial Risk |
Brorsson et al, 1995; hypercholesterolemia (HD)22 | |||||
19† | “My family gets heart attacks.” Including nongenetic family members | Perceived threat inherent in the association between hypercholesterolemia and the event in the FH | |||
Seriousness associated with fatal events, disability, and premature deaths | |||||
Time lag since FH of event less important | |||||
Chalmers & Thompson, 1996; cancer (breast)23 | |||||
23† | “Walking in relative’s path” | “Living the cancer experience” | “Developing a risk perception”: comparing aspects of personality, lifestyle, and body type; appraising own threatening experiences with breast abnormalities; personalizing the risk, variable, intuitive or reasoned | “Putting risk in its place”: controlling what one can; rehearsing one’s own cancer; “finding the best time” as emotional control over risk perception; adopting self-care practices | |
Amount of sharing of cancer experience: close attachment leads to greater shared experience | |||||
Phase and variability of illness trajectory: complicated illness leads to greater salience | |||||
Witnessing suffering: the physical and psychosocial impact | |||||
Emery et al, 1998; cancer (colorectal) (CRC)24 | |||||
26.25† | Understanding genetics differs from scientific explanation | Reconstructed risk according to personal and family experiences, and personal understanding of inheritance | Personalization of risk provides framework for control of own and family member’s risk | ||
“Risk framework” allows person to combine genetic and environmental risk and assess risk to offspring | |||||
Green et al, 1993; cancer (ovarian)25 | |||||
18.3 (17–19) | Ovarian cancer “in the family” | Awfulness of mother’s disease, rather than personal risk, especially among women whose mothers had recently died | Idiosyncratic use of genetic terms | Dominant concept of proneness or vulnerability, especially to illness experienced by close relative of same sex | Lack of control, powerless |
Relatively young age and dependent children of affected relatives particularly upsetting | Personal experience showed ovarian cancer likely to prove fatal if not detected early | Little understanding of genetic component of risk; also due to shared exposure to common risk factors | Similarities with unaffected parent could protect | No obvious controllable risk factors. Some considered removal of ovaries | |
Women whose mother had died recently showed more anxiety | Models of familial disease did not follow Mendelian genetics | Asymptomatic phase of disease | |||
Few realized ovarian cancer could pass through the male line | Positive about screening: “has to be better than nothing” | ||||
Peaks and troughs of anxiety, eg, before screening, approaching age of diagnosis of relative | |||||
General fear of cancer. Concern for daughters | |||||
Harris et al,1998; CRC26 | |||||
22 (21–23) | At risk if relative (not just FDR) had had CRC despite relative’s age. Magnitude of family history and death of relative increase seriousness of FH | Determinants of risk: genetic predisposition, environmental risks, increasing age, other cancer, low-fiber diet, “bad luck.” Concept of risk factors that trigger cancer, such as sunlight, constipation, pollution, shock | Perceived personal susceptibility due to FH | Screening seen as effective, although there was limited understanding | |
Variable access to family history information | Fear and older age were barriers to screening | ||||
Hunt et al, 2000; HD27 | |||||
25.3 (23–27) | HD viewed as family condition, with perceived FH more than number of cardiac events in family | Even with several affected relatives, some thought HD due to chance. All mentioned heredity | Distinction made between inherited risk within family as a whole and personal risk | Factors encouraging more healthy behavior: bodily markers of decline, health events, having children, financial stimuli, and enjoyment | |
Relationships, ages, and pattern of death add to importance, with age at death always mentioned | Complex mechanism: biological and social | Stressed differences from affected relatives to downplay risk | Barriers to change: uncertainty, image of HD as “a good way to go,” past material and cultural circumstances, costs, time constraints, lack of motivation | ||
Variable notion of premature death, and variable amount of FH information available | Notions of candidacy | ||||
Effects of gender and social class | Cardiac deaths of elderly relatives often discounted. Counter examples discussed, eg, fit young relatives “dropping dead” | ||||
Hunt et al, 2001; HD28 | |||||
17.5 (17–18) | Number of affected relatives, their age, and relationship | Genes or heredity mentioned as cause by more than 2/3 | Distinction made between inherited risk within family as a whole, and personal risk | Often highly ambivalent about FH | |
More weight given to deaths in FDRs, especially parents | Death of one (or more) relatives could be due to chance | Stressed differences from affected relatives to downplay risk, eg, smoking, taking after other side of family. | Many continue wrestling with decisions about modifying behavior, especially weight and effects of age | ||
Patterns of death, eg, age of death | Search for patterns to indicate heredity, eg, number of relatives with HD on one side of family | ||||
Variable notion of premature death | |||||
Men from manual socioeconomic groups required greater number of affected relatives to perceive FH | |||||
Incomplete knowledge of FH could lead to ambivalence | |||||
McAllister et al, 1998; cancer (breast)29 | |||||
22 (22) | Awareness that breast cancer may be inherited | Close involvement often distressing | Awareness of inheritance | Used inheritance of other characteristics, often following gender-specific pattern, to explain why not at personal risk | Continuing anxiety, especially about own and daughter’s risk |
Variable access to family history information; often avoided. Men often excluded from female illness discussions | Multifactorial model: not attributed solely to inheritance, also environmental risks such as smoking | (Potential) daughters at higher risk because of FH; no concerns about (potential) son’s health | Avoidance of, or exclusion from, discussions about breast cancer | ||
“Girl’s problem,” which most men colluded with | |||||
Michie et al, 1996; cancer (colorectal: familial adenomatous polyposis)30 | |||||
25 (25) | Young relatives die, undergo operations, or experience pain | Multifactorial models of genetic disease: all mentioned genes, although uncertainty about role; some aware of environmental causes. | Proneness, vulnerability not a problem | Some: “there is no problem” | |
“Genes as a black box.” | Screening seen as aversive, but important: “a necessary evil,” “seeing is believing” | ||||
Lay models of Mendelian inheritance | Vagueness about genetic testing: little evidence of informed decision making | ||||
Uncertainty of not being diagnosed | |||||
“Functional pessimism” to cope | |||||
Ryan & Skinner,1999; cancer (breast)31 | |||||
17.5 (17–18) | FH a risk factor, although most did not appreciate differences in risk depending on age of relative | Multifactorial model: lifestyle risks almost equal to familial risk; high-fiber diet or stress may be more important | Personalizing risk process | Screening could cause cancer | |
Misunderstandings about risk factors: environmental toxins and drugs thought influential | Proneness, vulnerability | Wanted thorough analysis of risk, then recommendations for lowering risk. Fewer than one half wanted to know genetic susceptibility status: many concerns. Risk modification by lifestyle changes welcomed | |||
Feelings of fatalism | Discounted risk information if affected relative had protective characteristic or no risk factors | ||||
Shepherd et al, 2000; type 2 diabetes mellitus (AODM)32 | |||||
14 (13–15) | Four generations of family had 14 affected family members. DM regarded as serious disease within family | Witnessing suffering of grandfather | Causes included chutney and germs contracted while in prisoner-of-war camp. Personal models of inheritance, such as youngest child, or alternate generations. Genetic information too complicated. Mental pictures of genes | Physical resemblance of family members linked to those thought likely to develop DM |
FH = family history; FDR = first-degree relative; HD = heart disease; DM = diabetes mellitus.
* Total score = 36.
† Pilot scores - consensus.