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Research ArticleOriginal Research

Comparison of Medical Diagnoses among Same-Sex and Opposite-Sex-Partnered Patients

Katie M. Heiden-Rootes, Joanne Salas, Jeffrey F. Scherrer, F. David Schneider and Craig W. Smith
The Journal of the American Board of Family Medicine November 2016, 29 (6) 688-693; DOI: https://doi.org/10.3122/jabfm.2016.06.160047
Katie M. Heiden-Rootes
From the Department of Family and Community Medicine, Saint Louis University School of Medicine, St. Louis, MO.
PhD, LMFT
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Joanne Salas
From the Department of Family and Community Medicine, Saint Louis University School of Medicine, St. Louis, MO.
MPH
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Jeffrey F. Scherrer
From the Department of Family and Community Medicine, Saint Louis University School of Medicine, St. Louis, MO.
PhD
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F. David Schneider
From the Department of Family and Community Medicine, Saint Louis University School of Medicine, St. Louis, MO.
MD, MSPH
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Craig W. Smith
From the Department of Family and Community Medicine, Saint Louis University School of Medicine, St. Louis, MO.
PhD, LMFT
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Abstract

Background: Health disparities for gay and lesbian individuals are well documented in survey research. However, a limitation throughout the existing literature is the reliance on self-reported health conditions. This study used medical record diagnoses for gay and lesbian patients seen in primary care clinics.

Methods: This study used medical records of primary care patients (n = 31,569) seen at Midwestern, university-affiliated primary care clinics. First, all records with information about the sexual partnering of the patient were identified (n = 13,509). Then, opposite-sex-partnered and same-sex-partnered (SSP) patients were compared for prevalence of common chronic conditions and clinic utilization.

Results: Only 44.20% of medical records included information about patients' sexual partners. Both male and female SSP patients were more likely to be lower socioeconomic status, be a current or former smoker, and be diagnosed with substance abuse/dependence and depression.

Conclusions: The findings suggest the need for more consistent screening of the sexual partnering of patients for identifying patients who are at greater risk of poorer health outcomes. However, identifying the sexual partnering of patients may not occur systematically in primary care, and there may be a lack of disclosure by SSP patients to their physicians given the social stigma about same-sex relationships.

  • Asthma
  • Chronic Disease
  • Depression
  • Diabetes Mellitus
  • Disclosure
  • HIV Infections
  • Homosexuality
  • Loneliness
  • Medical Records
  • Obesity
  • Prevalence
  • Primary Health Care
  • Self Report
  • Sexual Partners
  • Smoking
  • Social Stigma
  • Substance-related Disorders

Health disparities for gay and lesbian individuals are documented in state-wide data pools,1⇓–3 national surveys,4 and long-term data collection surveys looking at the courses of depression and anxiety.5 In particular, compared with heterosexual individuals, gay and lesbian persons tend to report more substance abuse, smoking,1 mental distress,4 loneliness,5 experience of more adverse childhood events (eg, abuse),5 obesity,2 and more chronic illness (eg, human immunodeficiency virus [HIV], diabetes, asthma).2,4 However, inconsistencies exist across samples, which may be the result of differences in sample demographics, sampling methods, or the influence of other stressful factors such as socioeconomic status (SES) or lack of social support.4 A limitation throughout the existing literature is the reliance on self-reported health conditions. Only a few studies6,7 have reported the prevalence of certain medical conditions (eg, obesity, sexually transmitted illnesses) from medical record diagnoses for gay and lesbian patients. In an effort to examine the types of health disparities that present in primary care settings for gay and lesbian patients and to inform the Healthy People 2020 goal of improving health among sexual minorities,8 this study compared the prevalence of chronic medical conditions, clinical utilization, and health status of gay, lesbian, and heterosexual patients seen at Midwestern, university-owned primary care clinics. The goal of the study was 2-fold: (1) to examine an additional sample of lesbian and gay patients based on medical records diagnoses; and (2) to identify specific medical needs and the impact of socioeconomic issues for lesbian and gay patients in primary care.

Methods

Subjects

Patient data and demographics were obtained from the Department of Family and Community Medicine's Primary Care Patient Data Registry (PCPD) at Saint Louis University. The PCPD Registry contains 33,661 patients that utilized 1 of the 3 family medicine or 1 of the 3 general internal medicine clinics in the St. Louis metropolitan area. The PCPD Registry was created by extracting deidentified electronic medical record data files from July 1, 2008, to June 30, 2015. The PCPD Registry contains information generated from patient visits, including International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) codes, laboratory orders and results, prescription orders, referral codes, procedure codes, vital signs, social history, and demographics. The Saint Louis University Institutional Review Board approved the creation and use of this cohort for primary care research.

Eligibility Criteria

For this study, patients has to be ≥18 years old (n = 31,569). Eligible patients were those who reported both being sexually active and the gender of their partner(s) (n = 13,963). This information is collected on a patient history form completed by all new patients and then recorded in the electronic records database. There is no consistent policy across clinics for updating or capturing missing information from the history forms. Of these eligible patients, 13,242 (94.8%) reported opposite-sex partners only and 582 (4.2%) reported only same-sex partners. Because of the small sample size, and in recognition of documented health differences for bisexual persons compared with gay and lesbian persons,4 139 patients reporting both opposite- and same-sex partners were not included in this study, leaving a final sample size of 13,509.

Measures

SES was based on a validated neighborhood SES index9 that uses 7 zip code–level measures from the American Community Survey 5-year (2009 to 2013) census estimates. The measure produced standardized SES categories generalizable to the United States. Psychiatric disorders and physical conditions were included if they were common chronic conditions in primary care. These included depression, anxiety, substance use disorder, smoking, obesity, metabolic and cardiovascular conditions, and pain. The total volume of primary care use was defined as the total number of clinic visits per month, categorized as quartiles. Demographics included age, race, sex, and SES. ICD-9-CM codes were used to define physical and psychiatric conditions. Depression and anxiety were determined by the presence of ≥2 ICD-9-CM codes (any of the following for depression: 296.2, 296.3, 311) for the condition within the same 12-month period. Requiring 2 visits with ICD-9 codes for diagnoses in electronic medical record data has been shown to have excellent agreement with physicians' written medical records.10,11 We applied the same logic for diagnostic algorithms to define a case of an anxiety disorder. Anxiety was a composite variable indicating the presence of any of the following disorders: anxiety disorder unspecified, generalized anxiety disorder, panic disorder, obsessive compulsive disorder, social phobia, and posttraumatic stress disorder. Any ICD-9-CM code for alcohol or drug abuse/dependence defined any substance use. Smoking was derived from social history data and ICD-9-CM codes for nicotine dependence; it was categorized as never, past, and current.

Metabolic diseases were defined by ICD-9-CM codes and included prediabetes, type 2 diabetes, and hyperlipidemia. Obesity was defined by ICD-9-CM code and/or body mass index ≥30 kg/m2. Cardiovascular disease included hypertension and a composite vascular disease variable for the presence of any of the following: diagnosis of hypertensive heart disease, ischemic heart disease, myocardial infarction, “other” heart disease, disease of pulmonary circulation, and cerebrovascular disease. Pain conditions included diagnoses for >900 conditions that were collapsed into 5 variables: neuropathy, headache, back pain, musculoskeletal pain, and arthritis. Last, we created a comorbidity index using the Romano-adapted Charlson Comorbidity Index, which is derived from the presence of 17 health conditions associated with morbidity and mortality.12 Higher comorbidity index scores indicate worse health.

Analytic Approach

We used a retrospective cohort and treated the entire observation period as a cross section. Comparisons of same-sex partner (SSP) and opposite-sex partner (OSP) groups were made separately for men and women. The χ2 test was used to test differences between categorical categories (eg, diagnosis, smoking status), whereas an independent samples t test was used for testing continuous variable differences (eg, comorbidity index).

Results

Among the full sample of adults, only 44.2% of patient medical records included information about their sexual partners. Results comparing the prevalence of chronic conditions across sexual partnering and gender are consistent with previous findings showing health and socioeconomic disparities (see Tables 1 and 2). Both male and female SSP patients were more likely to be in the lower socioeconomic quadrants compared with OSP patients; they also are more likely to have diagnoses of substance abuse and depression, are more likely to smoke, and are less likely to have quit smoking. For women in the sample (Table 1), women with an SSP were more likely to be diagnosed with obesity. For men in the sample (Table 2), men with an SSP reported significantly more anxiety and scored higher on the comorbidity index.

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Table 1.

Demographics and Chronic Disease Comparisons among Females, by Sexual Partner Groups (n = 8088)

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Table 2.

Demographics and Chronic Disease Comparisons among Males, by Sexual Partner Groups (n = 5421)

Discussion

The most significant finding of this study seems to be the lack of information about the sexual partnering of patients. Patients could easily skip over the items about sexual partnering on the history form when they wish not to disclose the information, and physicians may not follow up about the missing information. Despite this lack of information, health disparities seem to persist among patients with an SSP in the sample, which is consistent with previous findings.2 However, our analysis showed similar risks for various chronic illnesses. The higher comorbidity score for men with an SSP is likely the result of the higher weight placed on the diagnosis of HIV/AIDS. An HIV/AIDS diagnosis was significantly more likely for the men with an SSP in the sample and remains more prevalent among gay and bisexual male populations nationally.13 The difference in SES between patients with an SSP and those with an OSP likely creates financial barriers for obtaining quality food for a better diet and gaining access to health insurance and effective and ongoing treatment.14 Future research should examine possible disparities for sexual minority persons with chronic conditions in the course and treatment of the disease, such as diabetes and heart disease, to assess the long-term impact on health outcomes due to barriers related to obtaining effective treatment.

Implications for Practice and Medical Education

Practically, our findings suggest the need for more consistent screening and assessment of the sexual partnering of patients for identifying patients who are at greater risk of experiencing adverse or traumatic events,5 discrimination,15 chronic illness,2,4 substance abuse,1 and mental health concerns4. In 2011 the Institute of Medicine released a report recommending that health care providers gather information from patients about their sexual orientation and sexual partnering practices,16 and recommendations for how to do this in a welcoming clinical setting are available.17

However, identifying as a member of this marginalized group may present its own barriers. Providers are cautioned to consider their approach in soliciting the disclosure of sexual orientation and partnering in light of the history of stigma, violence, and marginalization experienced by sexual minority persons and the ways that knowing someone's sexual orientation may promote a more negative judgment of the patient,18,19 as well as increased assessments of mental health or substance abuse conditions only because of the patient's sexual orientation and not his or her reported symptomology—in other words, a bias or negative assumption about the health of a patient based solely on who they are partnered with. Instead, it seems what may be needed is more education and training about the experience of sexual minority persons in health care, and how to complete a sexual health history interview that uses gender-neutral language to open conversation about sexuality and build a trusting relationship between the patient and their health care team.17,20 A trusting relationship that fosters openness about sexuality will likely allow patients with an SSP to disclose as they feel comfortable and allow the physician to more thoroughly understand the needs of the particular patient they are treating.

Notes

  • This article was externally peer reviewed.

  • Funding: none.

  • Conflict of interest: none declared.

  • Received for publication January 28, 2016.
  • Revision received April 26, 2016.
  • Accepted for publication May 2, 2016.

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The Journal of the American Board of Family     Medicine: 29 (6)
The Journal of the American Board of Family Medicine
Vol. 29, Issue 6
November-December 2016
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Comparison of Medical Diagnoses among Same-Sex and Opposite-Sex-Partnered Patients
Katie M. Heiden-Rootes, Joanne Salas, Jeffrey F. Scherrer, F. David Schneider, Craig W. Smith
The Journal of the American Board of Family Medicine Nov 2016, 29 (6) 688-693; DOI: 10.3122/jabfm.2016.06.160047

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Comparison of Medical Diagnoses among Same-Sex and Opposite-Sex-Partnered Patients
Katie M. Heiden-Rootes, Joanne Salas, Jeffrey F. Scherrer, F. David Schneider, Craig W. Smith
The Journal of the American Board of Family Medicine Nov 2016, 29 (6) 688-693; DOI: 10.3122/jabfm.2016.06.160047
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Keywords

  • Asthma
  • Chronic Disease
  • Depression
  • Diabetes Mellitus
  • Disclosure
  • HIV Infections
  • Homosexuality
  • Loneliness
  • Medical Records
  • Obesity
  • Prevalence
  • Primary Health Care
  • Self Report
  • Sexual Partners
  • Smoking
  • Social Stigma
  • Substance-Related Disorders

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