Comparison of neuropsychological performance between AIDS-free injecting drug users and homosexual men.

We performed a cross-sectional comparison of the baseline neuropsychologic performance of 107 injecting drug users and 230 homosexual men participating in two longitudinal studies. Cognitive tests measured attention, memory and psychomotor speed. Using multiple regression modelling, the analysis adjusted for age, IQ score, race, six-month history of alcohol, cocaine, opiates and marijuana use, HIV serostatus and CD4+ lymphocyte count. Injecting drug users showed significantly poorer scores in all neuropsychologic tests in the univariate analysis. However, once adjusted for age, IQ score and race, only Rey Complex Figure tests were significantly worse among injecting drug users. These data indicate that age and IQ score rather than risk group account primarily for the differences in the cognitive performance, regardless of serostatus and CD4+ count.

Impact of on-site social work services on the documentation of client and family-centered information: the experience of Ryan White CARE Act (Title IV) pediatric program sites in Maryland.

BACKGROUND: The purpose of this study is to (1) describe client and maternal demographic, social, and medical characteristics of pediatric clients receiving medical and social services at Ryan White (Title IV) program sites, and (2) determine the impact of on-site social work services in documenting client and family-related information used to assess the psychosocial needs of the families affected by human immunodeficiency syndrome and acquired immunodeficiency syndrome (HIV/AIDS). METHODS: We studied infants born to known HIV-infected women who received HIV-related medical services at a federally funded Title IV Ryan White CARE Act provider site in Maryland. Eligibility criteria included < 24 months of age at time of initial clinic visit, a history of birth to a known HIV-infected woman, and a minimum of one comprehensive clinical visit for medical evaluation at a selected Title IV provider site. Study populations were categorized into three independent clinic cohorts. A pre- and postintervention study design was used to assess the impact of the intervention (i.e., on-site social work activities) on variables of interest. Clinic cohorts were (a) preintervention group (N = 181), from January 1, 1986 to December 31, 1989; (b) initial postintervention group (N = 216), from January 1, 1991 to December 31, 1992; and, (c) long-term postintervention group (N = 197), from January 1, 1993 to March 1, 1994. Client and maternal demographic, social, and medical information were recorded and statistical comparisons between pre- and postintervention clinic cohorts were completed with the use of standard statistical methods. RESULTS: Pediatric clients were predominantly African American (94%), lived in low-income family units reflected by the prevalence of public assistance programs (i.e., Medicaid), had a high likelihood of Medicaid enrollment (> 80%), and reported a high frequency of social disruption (e.g., protective services interventions and housing difficulties). Greater than half of all medical records documented the "mother" as the client's primary caregiver in the three cohorts (a,b,c, above) pre- and postintervention cohorts, 51%, 65%, and 66.5%, respectively. Over two-thirds of the mothers among all cohorts were reported to have a current or past history of illicit drug use or alcohol abuse, 69%, 62%, and 67.5%, respectively. Postintervention groups, both initial and long term, were significantly more likely than the preintervention group to have documented medical record information relevant to a history of protective services, housing problems, and maternal demographic, social, and clinical information. Maternal HIV-related clinical status and select social factors (e.g., drug use, housing) remained underreported in both postintervention groups. CONCLUSIONS: Title IV pediatric clinical sites deliver services to a predominantly urban, poor, minority community-the population at greatest risk for pediatric HIV-infection in Maryland. Alternative family members as the primary caregiver for infants and children was common and increased over time. These findings demonstrate that Title IV funded programs have been successful in the documentation of valuable client and maternal information necessary for the development of family-centered clinical and support services to a highly vulnerable population of HIV at-risk or infected infants and children in Maryland.

Racial differences in rate of CD4 decline in HIV-1-infected homosexual men.

OBJECTIVE: To determine whether racial differences exist in the rate of CD4 lymphocyte decline in HIV-1-infected homosexual men. DESIGN: Prospective cohort study. STUDY POPULATION: Non-Hispanic white (n = 321) and black (n = 102) HIV-1-seropositive homosexual and bisexual men were recruited from the Baltimore/Washington, DC metropolitan areas between 1984-1985 and 1987-1990, and evaluated semiannually. MAIN MEASUREMENTS: Changes in CD4 lymphocyte count and CD4 percentage over time were analysed using linear regression methods for the 271 white and 69 black participants who had at least four semiannual CD4 lymphocyte measurements. RESULTS: Rate of decline in CD4 lymphocyte count over 6 months was much slower among black than white seroprevalent men at all levels of baseline CD4 count (baseline 201-400 x 10(6)/l: + 0.24 versus -17.7 x 10(6)/l; 401-600 x 10(6)/l: -11.3 versus -23.9 x 10(6)/l; 601-800 x 10(6)/l: -15.1 versus -35.2 x 10(6)/l; > 800 x 10(6)/l: -4.3 versus -42.7 x 10(6)/l for black versus white, respectively), although this was only statistically significant for the lowest and highest strata of baseline CD4 count. These racial differences persisted after adjustment for recruitment period (1984-1985 or 1987-1990), follow-up duration, age and zidovudine therapy or Pneumocystis carinii pneumonia prophylaxis. Similar findings were observed among the 70 white and 11 black seroconverters. Black participants were also less likely than a subgroup of white participants matched on baseline CD4 lymphocyte count to be HIV-1 p24 antigen-positive. However, after acid dissociation of samples initially p24 antigen-negative, there were no significant differences in the prevalence of p24 antigenemia at enrollment or after 1 year of follow-up. CONCLUSIONS: This analysis suggests a more gradual decline in CD4 lymphocyte count among black than white Americans. The clinical significance of and reasons for this are unclear, but the lower prevalence of p24 antigenemia due to immune complexing among black Americans suggests that racial differences in the immune response to HIV may exist. Additional studies are needed to validate these findings in a larger cohort of non-whites, and to assess their relationship with other measures of cell-mediated immune function.

Weight loss prior to clinical AIDS as a predictor of survival. Multicenter AIDS Cohort Study Investigators.

In this analysis the aim was to determine the independent effect of moderate to severe weight loss prior to an AIDS diagnosis on survival after AIDS. The study was conducted as part of the Multicenter AIDS Cohort Study (MACS), a longitudinal study of HIV-1-seropositive gay or bisexual men. Measured weight and self-reported weight loss data were collected semiannually from 1984 through 1993. The study population included 962 HIV-1-seropositive men who developed clinical AIDS during the follow-up period. Median survival after AIDS was significantly lower for men with measured weight loss of > or = 4.5 kg 3-9 months and 3-15 months prior to AIDS, or who had lost > 10% of their baseline body weight compared with men with less weight loss or weight gain. Men with self-reported unintentional weight loss of > or = 4.5 kg 3-9 months prior to AIDS had significantly poorer survival (median = 1.05 years vs. 1.48 years; p = 0.0001) compared with men not reporting weight loss. After adjusting for potential confounding factors, men in the high measured weight loss group 3-9 months prior to AIDS still had significantly poorer survival [relative hazard (RH) = 1.36; p = 0.02]. Similar trends were seen for the two longer intervals prior to AIDS (RH = 1.38, p = 0.01; and RH = 1.50, p = 0.02, respectively). Men who self-reported weight loss > or = 4.5 kg 3-9 months prior to AIDS also had significantly poorer survival after AIDS (RH = 1.43; p = 0.002) in multivariate analysis.(ABSTRACT TRUNCATED AT 250 WORDS)

Beta 2-microglobulin and other early predictors of human immunodeficiency virus type 1-related wasting.

The objective of this study was to determine whether beta 2-microglobulin, neopterin, nutritional status, clinical status, immunosuppression, and hematologic status are predictors of human immunodeficiency virus (HIV)-related wasting and wasting syndrome. In addition, we aimed to determine which factors are early predictors and which are late predictors of wasting. For this cohort study of HIV-1-seropositive men seen semiannually from 1984 to 1991, a nested case-control design was used to analyze the predictive value of independent variables collected at baseline (first study visit for the seropositive cohort, first seropositive visit for seroconverters), 12 to 18 months prior, 6 to 12 months prior, and less than 6 months prior to the time at which case patients and control subjects were identified. Data on beta 2-microglobulin, neopterin, educational status, and diet were only available at baseline. A total of 41 case patients and 161 control subjects (n = 202) were identified. These were homosexual/bisexual men who were either HIV-seropositive on entering the study (n = 177) or who seroconverted during the study period (n = 25). Case patients were defined as men who had lost more than 10% of their baseline weight or who had a clinical diagnosis of wasting syndrome using the 1987 Centers for Disease Control definition. Control subjects had less than 5% weight loss from baseline or no weight loss at all. Four control subjects were matched to each case patient (where possible) by age and duration of follow-up.(ABSTRACT TRUNCATED AT 250 WORDS)

Comparison of clinical symptoms of human immunodeficiency virus disease between intravenous drug users and homosexual men.

BACKGROUND: To compare the prevalence of human immunodeficiency virus (HIV)-related clinical symptoms among male intravenous drug users and homosexual men stratified by HIV serostatus and CD4 cell levels. METHODS: A cross-sectional sample using concurrent longitudinal studies of the natural history of HIV-1 infection among intravenous drug users (N = 539) and homosexual men (N = 932) was recruited in Baltimore, Md. Participants were administered a risk behavior interview and physical examination, and had hematologic tests evaluated in a similar calendar period. RESULTS: Both risk groups demonstrated an inverse relationship between frequency of symptoms and CD4 cell count. Fever, night sweats, and lymphadenopathy were not evaluated because pilot data suggested a confounding association with drug injection. Among those with mild to moderate immune suppression, intravenous drug users were significantly more likely than homosexual men to experience fatigue, weight loss, diarrhea, and shortness of breath; to have oral candidiasis, palpable spleen, and lower mean weight on physical examination; and abnormal hematocrit, platelets, and total lymphocyte counts. However, participants in either risk group with CD4 cell levels below 0.2 x 10(9)/L experienced similar frequency of all clinical symptoms. Self-reported oral candidiasis increased fourfold with HIV infection and was as likely in both groups at all CD4 cell levels. Duration and recency of intravenous drug use was not significantly associated with the higher frequency of most clinical symptoms. CONCLUSION: Social factors are an important consideration in evaluating the association between clinical symptoms and HIV immunosuppression. Except for oral candidiasis, there are limitations for the use of clinical symptoms as intermediate outcome measures for HIV infection among intravenous drug users.

Relationship of hepatitis B virus infection to human immunodeficiency virus type 1 infection.

The Multicenter AIDS Cohort Study (MACS) was designed to study the natural history of human immunodeficiency virus type 1 (HIV-1) infection, including the relationship between hepatitis B virus (HBV) and HIV-1 infection. In total, 4954 homosexual men were recruited from April 1984 through March 1985 and have been followed up thereafter every 6 months. Hepatitis B surface antigen and hepatitis B core antibody were tested for at the first visit by RIA or EIA; HIV-1 antibody testing was done at each visit by ELISA and confirmed by Western blot assay. The role of HBV infection in HIV-1 seroconversion was studied by stratification for sexual behavior and disease visit by visit. The adjusted risk ratio was 2.02 for hepatitis B surface antigen carriers and 2.14 for hepatitis-immune cases compared with hepatitis B-susceptible subjects. Similar results were obtained using a logistic regression model. After taking into account changes in sexual behavior and disease over time, the authors conclude that past HBV infection remains suspect as a cofactor or as a surrogate for other factors associated with HIV-1 seroconversion.

Longitudinal study of homosexual couples discordant for HIV-1 antibodies in the Baltimore MACS Study.

Thirty-six sexually active couples serologically discordant for human immunodeficiency virus, type 1 (HIV-1), within the Baltimore Multicenter AIDS Cohort Study (MACS) were assessed to determine whether evidence of HIV-1 infection could be detected in the HIV-1-antibody-negative partners and whether factors associated with lack of transmission of HIV from the seropositive to the seronegative partner could be ascertained. Six HIV-1 seropositive couples and 18 seronegative couples were followed concurrently for comparison. None of the seropositive subjects had an AIDS-defining illness at entry into the study, and all subjects were followed for 1 year. A separate evaluation of unprotected anal receptive and insertive intercourse between discordant couples indicated high-risk activities for a median of 40 months, as reported by the HIV seropositive partner. Despite this finding, none of the HIV-1 seronegative men in discordant couples had evidence of HIV-1 infection by viral culture, p24 antigen testing, or polymerase chain reaction for HIV-1 DNA. Discordant seronegatives and seropositives did not differ from concordant seronegatives and seropositives in numbers of circulating CD4, CD8, and natural killer lymphocytes or in prevalence of antibodies to herpes simplex virus, type 1, Epstein-Barr virus, or cytomegalovirus, except that discordant seronegative men were less likely than their seropositive partners to have antibodies to herpes simplex virus, type 2. The reason for the apparent lack of HIV-1 infection in seronegative discordant individuals remains unexplained and did not appear to be associated with type of sexual activity, T-lymphocyte subsets or natural killer cells, or early stage of HIV-1 disease.

No evidence for a role of alcohol or other psychoactive drugs in accelerating immunodeficiency in HIV-1-positive individuals. A report from the Multicenter AIDS Cohort Study.

In a multicenter cohort study of homosexual men, the proportion of seropositives at enrollment who developed the acquired immunodeficiency syndrome (AIDS) during the following 18 months ranged from 5.5% to 8.2% in 1597 alcohol drinkers vs 9.2% in 109 nondrinkers with no clear trend according to use, and from 6.3% to 9.6% for 1662 users vs 7.2% for 83 nonusers of psychoactive drugs prior to enrollment. Among seropositive men with low initial T helper lymphocyte counts, those who continued to use drugs showed no significantly higher 18-month risk of AIDS than nonusers (13% vs 10%); the corresponding risks were 13% and 15%, respectively, for continued heavier vs continued lighter consumption of alcohol. No other manifestations of immunodeficiency were positively associated with substance use prior to enrollment. Prior use was not associated with low mean T helper cell counts at enrollment, and continued drug or alcohol use after enrollment was not associated with greater subsequent decline in counts. As used in a large cohort of homosexual men, psychoactive substances did not enhance the progression of human immunodeficiency virus infection.

Human immunodeficiency virus and the nervous system.

In conclusion, there are a number of neurological manifestations of HIV infection, affecting both the central and peripheral nervous systems. Involvement of the CNS may occur very early in the course of infection and manifest itself as an acute aseptic meningitis. HIV encephalopathy is currently the most commonly diagnosed neurologic disorder associated with HIV and may in fact occur as a direct result of HIV infection in the brain. In years to come, HIV encephalopathy may assume epidemic proportions. Thus, nurses and other health care workers will have to be well versed in the major symptoms as well as the subtleties associated with this disease. Any drugs effective in treating these neurologic disorders must be capable of crossing the blood-brain barrier. AZT is currently being evaluated in the treatment of HIV encephalopathy. Only carefully designed prospective studies will define the natural history of neurologic disorders seen with HIV infection, as well as drugs effective in their treatment.