Stroke assessment: morphometric infarct size versus neurologic deficit.

We presently examine the relation between histologic infarct size and neurologic deficit as endpoints and seek to clarify their sensitivity in defining stroke outcome. Neurologic deficits of 76 cats subjected to middle cerebral artery occlusion were assessed daily and correlated with the corresponding infarct sizes determined morphometrically after 2 weeks' survival. A five-item neurologic deficit score included the time elapsed until hemiparesis, and forced circling resolved (if ever), presence of impaired placing reactions and time elapsed until able to stand and being alert. We then evaluated the two endpoints' statistical powers to detect group differences using two sets of comparison groups. The neurologic deficit score correlated well with infarct size (r = 0.76, p < 0.001) and each of the individual deficit score components named above, in turn, correlated with decreasing power with infarct size. Even so, the number of study subjects required to achieve the same level of statistical significance in assessing group differences was two-fold greater when using the neurologic deficit than the infarct size data: Group sizes of eight and five animals were sufficient for significant infarct size differences while the groups needed be expanded to 15 and 10 animals to similarly achieve significant neurologic score differences. Thus, infarct size emerges as a more sensitive measure of stroke outcome than does the assessment of neurologic deficits.

Developing an AHC-MCO alliance for research and care.

Academic health centers (AHCs) and managed care organizations (MCOs) appear to be on a collision course. Is it possible to develop a partnership to enable both parties to achieve their respective goals and objectives? The Kimmel Cancer Center of Thomas Jefferson University and AEtna US Healthcare, one of the nation's largest MCOs, have developed an alliance designed to generate cancer prevention and control research. This arrangement engages the participants in a collaborative effort that is aimed at creating new knowledge that can be used to enhance the provision of health care to a defined population.

Analysis of colorectal cancer stage among HMO members targeted for screening.

BACKGROUND: This study is a retrospective analysis of data collected from patient medical records, a fecal occult blood test (FOBT) screening program, and computerized health maintenance organization (HMO) claims and encounters records. OBJECTIVE: To identify factors associated with a diagnosis of early (Dukes A and B) colorectal cancer among older adults targeted for annual FOBT screening. METHODS: Study subjects were insured by the former US Healthcare Inc (Blue Bell, Pa), an independent practice association-type HMO. The HMO was recently integrated into Aetna-US Healthcare. Before diagnosis, subjects were eligible for free annual FOBT screening through the HMO's colorectal cancer screening program. The study subjects included men and women (N = 222) who were aged 50 years or older and had a diagnosis of colorectal cancer between 1987 and 1990. Variables considered were patient age, gender, socioeconomic status, medical history, screening history, length of enrollment in the HMO, and stage of disease at diagnosis. RESULTS: Univariate analyses indicate that colorectal cancer diagnosis due to FOBT screening (P = .03), frequency of FOBT screening (P = .09), and length of HMO membership (P = .10) were positively related to being diagnosed as having early stage colorectal cancer. Multivariable analysis shows that having a screen-detected colorectal cancer was significantly and positively related (P = .03) to being diagnosed as having early stage disease. CONCLUSIONS: Findings support annual FOBT screening among older adults. Results illustrate the value of applying standard methods to the collection and analysis of patient data in a managed care context. The study also highlights a need for research on patient adherence to screening and physician follow-up of abnormal screening test results.

Adherence to continuous screening for colorectal neoplasia.

Continuous screening is defined as the periodic provision of an opportunity for diagnostic testing to a population of individuals who are asymptomatic and at increased risk for disease. If screening is offered periodically irrespective of response to an earlier screening invitation, this situation may be referred to as serial screening. When continuous screening is made available only to individuals who had tested previously, population member response is referred to as repeat screening. This study assessed adherence to serial- and repeat-colorectal cancer screening among older adult members of an independent practice association-type health maintenance organization (HMO) in two consecutive rounds of screening. In the first screening round, fecal occult blood tests (FOBTs) were sent to 1,565 subjects who were randomly assigned to receive usual care or behavioral interventions intended to encourage testing. Overall, 647 (41%) subjects completed and returned their tests. In the second screening round, FOBTs were mailed again to all subjects; however, the interventions were discontinued. Logistic regression analysis results shows that first-round testing was a significant independent predictor of serial adherence for subjects older than 65 years of age (odds ratio[OR] = 10.8) and those younger than 65 years of age (OR = 10.9); and a significant negative association between exposure to first-round intervention and serial adherence (OR = 0.5) was found among younger subjects. Among first-round adherers, age was significantly and positively related to repeat adherence (OR = 1.6). However, exposure to first-round intervention and having an abnormal FOBT result were significantly and negatively associated with repeat adherence (OR = 0.5 and OR = 0.4, respectively). The results of this study reported here indicate that previous screening is a strong predictor of serial adherence, and special efforts may be required to achieve high levels of serial and repeat adherence among younger adults. Additional research is needed to understand why persons with abnormal screening test results are unlikely to engage in repeat screening.

Behavioral interventions to increase adherence in colorectal cancer screening.

This investigation was a randomized controlled trial to determine the impact of health education interventions on the return of mailed fecal occult blood (FOB) tests (FOBT adherence) in a colorectal cancer screening program. The study sample included 2,201 men and women aged 50 to 74 years who were members of an Independent Practice Association (IPA)-type health maintenance organization (HMO). Subjects were randomly assigned to a "usual care" Control Group (advance letter, screening kit, reminder letter), and Treatment Groups 1 (usual care + reminder call), 2 (usual care + self-held screening booklet + reminder call), or 3 (usual care + self-held screening booklet + instruction call + reminder call). Bivariate analysis revealed significant differences in adherence (P less than .001) across study groups: Control Group (27%), Group 1 (37%), Group 2 (37%), Group 3 (48%). In addition, a significant positive association between age and adherence (P less than .001) was found. Logistic regression analysis revealed an interaction between sex and treatment. Adherence among men in all treatment groups increased significantly (P less than .0001) in relation to Control Group males. Men in Group 3 also were more likely to adhere than those in Group 2 (P less than .01) or Group 1 (P less than .01). Among women, adherence was significantly higher in Group 3 than in Group 2 (P less than .03), Group 1 (P less than .025), or the Control Group (P = .0008). The primary reason cited for nonadherence was perceived inconvenience of the FOB testing procedure.

Adherence to colorectal cancer screening in an HMO population.

This study aimed to determine factors that influence fecal occult blood test performance in colorectal cancer screening. A random sample was selected of men and women ages 50 to 74 years of age who had been mailed a fecal occult blood testing kit in a screening program in fall 1986. One year after initial test mailing, sample group members (n = 504) were surveyed by telephone. Four months later, the survey sample received a second fecal occult blood test mailing. Multivariable analysis for subjects with validated past fecal occult blood test status (n = 322) revealed the past testing was positively associated with physician encouragement of screening, age, the belief that cancer is curable, perceived test efficacy, and strong intention to do testing. It also was discovered that persons who felt that they had little control over their health were more likely to have done past testing. Preliminary analysis of prospective adherence showed that the strongest statistically significant independent predictor was past test performance. Prospective adherence among past nontesters (n = 121) was associated with expressed commitment to do fecal occult blood testing and reported presence of colorectal cancer risk factors. Analysis of adherence among past testers (n = 201) revealed that belief in colorectal cancer curability and age were significant predictors. The findings reported here indicate that factors influencing adherence among past nontesters differ from those for past testers. Overall, these results suggest that to increase participation in colorectal cancer screening, physicians and other health professionals should (a) deliver educational messages that increase awareness of risk factors for colorectal cancer and curability of the disease, and (b) elicit from potential screenees a commitment to engage in recommended preventive behaviors. It may also be well to consider "tailoring" messages for past nontesters and past testers, respectively, by emphasizing colorectal cancer risk factors and highlighting curability.

Some reasons for compliance and noncompliance in a health maintenance organization breast cancer screening program.

Impressive reductions in breast cancer mortality have been demonstrated through regular screening programs using mammograms and clinical breast examinations. Nevertheless, only a small proportion of American women obtain annual mammograms. The US HEALTHCHECK breast cancer screening program offered free breast cancer screening to age-eligible members of a Health Maintenance Organization. Subscribers were mailed packets of materials and asked to return a Breast Risk Assessment Form to determine their eligibility to receive a free mammogram. This study was conducted to assess why women did or did not return a Breast Risk Assessment Form. Brief telephone interviews were conducted with a random sample of compliers and noncompliers (n = 502). Women who complied by returning the Risk Assessment Form said more frequently that they were unlikely to get breast cancer, were older, and more likely to have read the materials and to have rated them positively than women who did not return the Risk Assessment Form.