Comparison of health care expenditures among insured users and nonusers of complementary and alternative medicine in Washington State: a cost minimization analysis.

OBJECTIVES: The purpose of this analysis was to compare health care expenditures between insured patients with back pain, fibromyalgia syndrome, or menopause symptoms who used complementary and alternative medical (CAM) providers for some of their care to a matched group of patients who did not use any CAM care. Insurance coverage was equivalent for both conventional and CAM providers. DESIGN: Insurance claims data for 2000-2003 from Washington State, which mandates coverage of CAM providers, were analyzed. CAM-using patients were matched to CAM-nonusing patients based on age group, gender, index medical condition, overall disease burden, and prior-year expenditures. RESULTS: Both unadjusted tests and linear regression models indicated that CAM users had lower average expenditures than nonusers. (Unadjusted: $3,797 versus $4,153, p = 0.0001; beta from linear regression -$367 for CAM users.) CAM users had higher outpatient expenditures that which were offset by lower inpatient and imaging expenditures. The largest difference was seen in the patients with the heaviest disease burdens among whom CAM users averaged $1,420 less than nonusers, p < 0.0001, which more than offset slightly higher average expenditures of $158 among CAM users with lower disease burdens. CONCLUSIONS: This analysis indicates that among insured patients with back pain, fibromyalgia, and menopause symptoms, after minimizing selection bias by matching patients who use CAM providers to those who do not, those who use CAM will have lower insurance expenditures than those who do not use CAM.

Chiropractic use by urban and rural residents with insurance coverage.

PURPOSE: To describe the use of chiropractic care by urban and rural residents in Washington state with musculoskeletal diagnoses, all of whom have insurance coverage for this care. The analyses investigate whether restricting the analyses to insured individuals attenuates previously reported differences in the prevalence of chiropractic use between urban and rural residents as well as whether differences in provider availability or patient cost-sharing explain the difference in utilization. METHODS: Claims data from 237,500 claimants in 2 large insurance companies in Washington state for calendar year 2002 were analyzed, using adjusted clinical group risk adjustment for differences in disease burden and rural urban commuting area codes for rurality definition. FINDINGS: The proportion of claimants using chiropractors was higher in rural than urban residents (44% vs 32%, P < .001). Lack of conventional providers in rural areas did not completely explain this difference, nor did differences in patient cost-sharing or demographics. Among those who used chiropractors, those in urban areas had more chiropractic visits than users of chiropractic in rural areas. CONCLUSIONS: Among insured adults, use of chiropractic care was higher in rural than in urban areas. Reasons suggested for this difference in previous reports were not borne out in this data set.

Complementary and alternative medicine provider use and expenditures by cancer treatment phase.

OBJECTIVE: To assess the use of complementary and alternative medicine (CAM) providers and the associated expenditures by specific treatment phases among patients with cancer. STUDY DESIGN: Cross-sectional analysis of medical services utilization and expenditures during the 3 therapeutic phases of initial, continuing, and end-of-life life treatment. METHODS: Analysis of an insurance claims database that had been matched to the Washington State Surveillance, Epidemiology, and End Results cancer registry. RESULTS: Of 2900 registry-matched patients, 63.2% were female, the median age was 54 years, and 92.7% were of white race/ethnicity. Breast cancer was the most frequent diagnosis (52.7%), followed by prostate cancer (24.7%), lung cancer (10.1%), colon cancer (7.0%), and hematologic malignancies (5.6%). Patients using CAM providers represented 26.5%. The proportion of patients using CAM was similar during each treatment phase. All patients used some conventional care. Age, female sex, breast cancer diagnosis, and white race/ethnicity were significant predictors of CAM use. Diagnosis of a musculoskeletal problem occurred at some time during the study for 72.1% of patients. CAM provider visits represented 7.2% of total outpatient medical visits, and 85.1% of CAM visits resulted in a musculoskeletal diagnosis. Expenditures for CAM providers were 0.3%, 1.0%, and 0.1% of all expenditures during the initial, continuing, and end-of-life phases, respectively. CONCLUSIONS: For patients with cancer, musculoskeletal issues were the most commonly listed diagnosis made by a CAM provider. Although expenditures associated with CAM are a small proportion of the total, additional studies are necessary to determine the importance that patients place on access to these services.

Maternal work and birth outcome disparities.

OBJECTIVES: We tested relations between aspects of maternal work and birth outcomes in a national sample and in subgroups known to experience disparities. METHODS: Three indices of work attributes (Status and Recognition, Physical Demands, and Exposure to Conflict) were derived by factor analysis of variables extracted from the Department of Labor's O*Net database. The indices were linked to the National Longitudinal Survey of Youth using occupation codes for the primary jobs held by women who gave birth between 1979 and 2000 and worked during the quarter prior to birth (n = 3,386 births to n = 2,508 mothers). Multiple regression was used to model birth outcomes as functions of the work attribute indices, controlling for several measures of socioeconomic status and risk factors for adverse birth outcomes. RESULTS: In the full sample, work-related Physical Demands were associated with lower average birthweight and increased odds of preterm birth while Status and Recognition was associated with higher average birthweight and lower odds of fetal growth restriction. In stratified models, Status and Recognition was associated with higher birth weight among women with low (versus high) income and with lower odds of preterm birth among women with low (versus high) education. Physical Demands were associated with higher rates of preterm birth among women with low (versus high) income and education and among African-American mothers (compared to Whites). CONCLUSIONS: The work environment is an important predictor of healthy births. Relations between maternal work attributes and birth outcomes differ by race/ethnicity and socioeconomic status and according to the outcome under investigation. Further research with measures of work attributes specific to maternal work experiences is recommended to confirm our findings.

Use of complementary and alternative medicine providers by fibromyalgia patients under insurance coverage.

OBJECTIVE: To quantify how visits and expenditures differ between insured patients with fibromyalgia syndrome (FMS) who visit complementary and alternative medicine (CAM) providers compared with patients with FMS who do not. Patients with FMS were also compared with an age- and sex-matched comparison group without FMS. METHODS: Calendar year 2002 claims data from 2 large insurers in Washington state were analyzed for provider type (CAM versus conventional), patient comorbid medical conditions, number of visits, and expenditures. RESULTS: Use of CAM by patients with FMS was 2.5 times higher than in the comparison group without FMS (56% versus 21%). Patients with FMS who used CAM had more health care visits than patients with FMS not using CAM (34 versus 23; P < 0.001); however, CAM users had similar expenditures to nonusers among patients with FMS ($4,638 versus $4,728; not significant), because expenditure per CAM visit is lower than expenditure per conventional visit. Patients with FMS who used CAM also had heavier overall disease burdens than those not using CAM. CONCLUSION: With insurance coverage, a majority of patients with FMS will visit CAM providers. The sickest patients use more CAM, leading to an increased number of health care visits. However, CAM use is not associated with higher overall expenditures. Until a cure for FMS is found, CAM providers may offer an economic alternative for patients with FMS seeking symptomatic relief.

The effect of complementary and alternative medicine claims on risk adjustment.

OBJECTIVE: We sought to assess how the inclusion of claims from complementary and alternative medicine (CAM) providers affects measures of morbidity burden and expectations of health care resource use for insured patients. METHODS: Claims data from Washington State were used to create 2 versions of a case-mix index. One version included claims from all provider types; the second version omitted claims from CAM providers who are covered under commercial insurance. Expected resource use was also calculated. The distribution of expected and actual resource use was then compared for the 2 indices. RESULTS: Inclusion of claims from CAM providers shifted 19,650 (32%) CAM users into higher morbidity categories. When morbidity categories were defined using claims from all providers, CAM users in the highest morbidity category had average (+/-SD) annual expenditures of $6661 (+/-$13,863). This was less than those in the highest morbidity category when CAM provider claims were not included in the index ($8562 +/- $16,354), and was also lower than the highest morbidity patients who did not use any CAM services ($8419 +/- $18,885). CONCLUSIONS: Inclusion of services from CAM providers under third-party payment increases risk scores for their patients but expectations of costs for this group are lower than expected had costs been estimated based only on services from traditional providers. Risk adjustment indices may need recalibration when adding services from provider groups not included in the development of the index.

Complementary and alternative provider use by insured patients with diabetes in Washington State.

OBJECTIVES: The authors investigated whether insurance coverage for complementary and alternative medicine (CAM) providers is associated with increased medical care use among diabetes patients. Predictors of CAM use and how CAM affects health care use and expenditures under insurance coverage were examined. DESIGN: Claims data from two large insurers in Washington State were obtained for 2002. Types of providers used, comorbid medical conditions, number of visits, and expenditures were calculated for the study sample and compared to a nondiabetic matched group. RESULTS: Of the 20,722 adults with diabetes, 3605 (17.4%) had one or more visits to any licensed CAM provider (mostly chiropractors). This was lower than the 20% CAM use in the comparison group. Diabetes patients who used CAM were more likely to have multiple other medical problems than CAM nonusers. CAM users had a higher average number of annual outpatient visits compared to nonusers (28 versus 16), and higher average annual expenditures (8,736 dollars versus 7,356 dollars); however, after adjustment for disease load and other factors, CAM use was not a significant predictor of expenditures. CAM use was <2% of the overall mean medical expenditures for diabetes patients. Quality of conventional care was similar for CAM users and nonusers. CONCLUSIONS: CAM provider usage when covered by insurance is lower among diabetes patients than in adults without diabetes and represents a small proportion of diabetes care costs. Very few CAM visits were related directly to diabetes care. CAM-using patients often have heavy disease burdens and high total expected resource use compared to those not using CAM.