a prospective, observational study to examine the effects of ageing on the clinical outcomes of people living with hiv in south korea

Conditions: HIV Infection

Summary: this study is to investigate how hiv affects ageing process, especially in asian populations in various organ system, including brain, kidney, liver and etc. there are some articles that describing the ageing process in pwhiv, but there has been a limited number of articles that comparing ageing process by ethnicities. and the endpoints of those limited number of articles are including more general variables like all-cause mortality, detectable viral load and days to regimen changes. there is no extensive study of ageing by function of each organ system in asia. this proposal contains more specific observation points on function/dysfxn of each organ system, especially for brain function as an mri sub-study. the mri sub-study has a large portion of this proposal as analysis of the neurocognitive function in hiv ageing, which has not been extensively studied in asia, nor it hasn't been compared to other ethnic groups. with this proposal, we can see if there are differences by ethnicities compared to poppy/cobra results, and even if there are no differences, we can increase the number and diversify of cohort subjects and strengthen the level of evidence of cohort study. our study, by enrolling both younger and older hiv-positive individuals with a matched hiv-negative control group, will be in the unique position to determine the effects of ageing and hiv status on chronic hiv-infection. in addition, results from this study will be well placed to assist in informing future hiv treatment guidelines on the monitoring of chronic hiv infection in older subjects and assisting in the design of future interventional studies for the treatment of age associated co-morbidities.

study design: multicentre, prospective, observational study over 3 years. our study will describe the impact of advancing age on the experience of living with hiv in south korea. to address this we will establish cohorts of hiv-positive people aged \>50 and \ 50 years. although 2 years of follow up duration is short period to evaluate the effect of aging, this period could give us an insights for necessity of longer follow up study. setting: subjects will be recruited from three clinics: severance hospital; seoul medical center; national medical center. number of patients: older hiv-positive cohort (n=500); younger hiv-positive cohort (n=250); hiv-negative cohort (n=250). we arbitrarily decided these numbers of subjects considering the numbers of subjects of poppy-uk study (1000, 500, and 500 subjects, respectively), feasibility of recruitment, and possible budget. our choice of sample size is largely pragmatic, reflecting the number of older patients receiving care and the proportion that are expected to participate. detailed sample size calculations are difficult given the wide range of topics and methodological approaches proposed. sample size was chosen pragmatically based on 1) the number of hiv pts of three participating hospitals (nmc≒1200, severance≒700, smc≒300) 2) feasibility of recruitment 3) and possible budget 1. screening each subject must sign an informed consent form prior to the conduct of any screening procedures. the purpose of the screening visit is to evaluate that the subject meets study inclusion/exclusion criteria. hiv antibody testing will be undertaken for subjects undergoing screening for the hiv-negative cohort. 2. visit 1 (baseline visit) the baseline visit will perform evaluations as per schedule of visits. the baseline visit is expected to take 1-2 hours; if possible the subject should attend fasted. the following information will be collected: • baseline demographics: age; sex; sexual orientation; date of birth; education. • socio-economic status: employment; household dependents; household income; housing. • quality of life questionnaire. • anthropometrics: height; weight; body mass index; waist circumference. • lifestyle factors: current/past cigarette smoking; alcohol use; recreational drug use. • full clinical history: to include cardiovascular events (hypertension, myocardial infarction, angina or acute coronary syndromes, cardiogenic arrhythmias, coronary artery stenting/bypass grafting, peripheral vascular disease), renal failure, liver failure, diabetes, malignancies, falls, fractures, joint disease or joint replacements. • simple measurement of walking speed over a distance of 15 feet (457 cms). • blood pressure will be estimated using an automated device. • family medical history: to include any cardiovascular disease, type 2 diabetes mellitus, malignancies, mental illness, dementia or alzheimer's disease, parental hip fractures. • current and recent (over past 12 months) antiretroviral use: type of antiretroviral; start/stop dates; dose; frequency of dosing; side effects; reasons for prior changes/discontinuations. • duration of hiv infection and date of hiv-seroconversion if known * adherence assessment * use of any other medications (including, but not limited to, anti-hypertensives, anti-depressants, vitamin d and/or calcium replacement therapy, lipid-lowering drugs, regular use of analgesics, herbal remedies, other over-the-counter drugs): type of drug; start/stop dates; dose; frequency of dosing; side effects. * neurocognitive function: specific memory and cognitive testing assessing cortical and sub-cortical function. * pain assessment: regional and widespread pain collected using a validated mannequin; nature of onset; duration; intensity; resulting disability * falls risk (study questionnaire) * fracture risk (study questionnaire) * frailty assessment (study questionnaire) * most recent laboratory tests will be recorded (assessed in the hiv-negative cohort): renal, liver, lipid and bone profiles, glucose, full blood count, sexual health screen, hepatitis c serology. these tests should have been performed within a year of the clinic visit. * blood (serum, plasma, and pbmc) and urine samples: stored for subsequent projects of the potential pathogenic mechanisms underlying age-related diseases. this will include assessment of vitamin-d and pth * blood (plasma) will be collected for pharmacokinetic analysis (including but not limited to antiretroviral drug exposure) 3. visit 2 (1st year follow up visit) this follow up visit will be performed as per schedule of visits. only hiv-positive cohorts will be invited to undertake this visit with this visit expected to take 1 hour. the following will be assessed: * changes to lifestyle and socio-economic status over the past year. * significant clinical events occurring over the past year: dates of onset and resolution, use of medical services, changes to antiretroviral and other medications, and resulting ongoing health concerns. * blood pressure will be estimated using an automated device. * details of access to health care services over the past year: visits to hospital, and medical investigations performed (information obtained by direct questioning and through medical records review). * most recent laboratory tests will be recorded: renal, liver, lipid and bone profiles, glucose, full blood count, sexual health screen, hepatitis c serology (within the past year) * concomitant medications: start/stop dates; dose; dosing frequency; side effects. * fracture occurrence and fracture risk (see study questionnaire in appendix 1) * regional and widespread pain. 3a visit 2 (1st year follow up visit) for hiv negative participants. these participants will be contacted by telephone by arrangement with the study nurse. they may be asked to attend the clinic in order to facilitate this visit. details of any changes in circumstances or illnesses and medication will be documented. 4 visit 3 (2nd year follow up visit) this follow up visit will be performed as per schedule of visits (2.0). this visit is expected to take 1-2 hours; if possible the subject should attend fasted. the following information will be collected: * changes to lifestyle and socio-economic status over the past year. * significant clinical events occurring over the past year: dates of onset and resolution, use of medical services, treatments, and resulting ongoing health concerns. * details of access to health care services over the past year: visits to hospital, and medical investigations performed (information obtained by direct questioning and through medical records review). * simple measurement of walking speed over a distance of 15 feet (457 cms). * blood pressure will be estimated using an automated device. * concomitant medications: start/stop dates; dose; dosing frequency; side effects. * fracture occurrence and fracture risk (see study questionnaire in appendix 1). * neurocognitive function: specific memory and cognitive testing assessing cortical and sub-cortical function. * respiratory questionnaire * regional and widespread pain. * quality of life questionnaire. * most recent laboratory tests will be recorded (assessed in the hiv-negative cohort): renal, liver, lipid and bone profiles, glucose, full blood count, sexual health screen, hepatitis c serology (within the previous year) * blood (serum, plasma, and pbmc) and urine samples: stored for subsequent projects of the potential pathogenic mechanisms underlying age-related diseases. this will included assessment of vitamin-d and pth * blood (plasma) will be collected for pharmacokinetic analysis (including but not limited to antiretroviral drug exposure) 5 mri sub-study * a sub-study will be conducted at the severance hospital site for participants equal to and over the age of 50 both hiv +ve (n=20) and hiv -ve (n=20). matching criteria would be age, sexual orientation, and socio-economic status (i.e. insurance coverage status). the study will comprise of three study visits: 1. screening 2. visit 1 (baseline visit) 3. visit 2 (follow up visit after 2 years) the study visits will include the following assessments blood (serum, plasma, and pbmc), urine, csf and stool samples stored for future analysis (genetic polymorphism associated with neurocognitive dysfunction, csf concentrations of antiretrovirals, biomarkers such as csf neurofilament light (nfl) chain concentration, microbiome of stool, etc) neurocognitive testing lumbar puncture examination cerebral mri scan respiratory function and cardiac function assessments 6 withdrawal of subjects from study subjects are allowed to decline further participation in the study at any time. this will not affect their future care. 7 study timelines recruitment and baseline visits (visit 1) will take place from months 1-12, with annual visits from months 13-24 (visit 2) and 25-36 (visit 3)

Eligibility criteria:
inclusion criteria: 1. older hiv-positive cohort (n=500): * documented hiv infection * age \>50 years at study entry * korean ethnicity * likely route of hiv acquisition via sexual exposure by male to male exposure * able to comprehend study patient information leaflet. * virologically suppressed subjects subjects with primary hiv infection are eligible and investigators are encouraged to recruit such subjects. our target population (those infected with hiv via sexual routes of men who have sex with men) has been chosen as this group represent the vast majority of older hiv-positive individuals attending for care in korea; analyses of other groups (e.g. injection drug users, those infected through blood/blood products and transgender individuals), who may have very different needs and outcomes, would likely be under-powered. 2. younger hiv-positive cohort (n=250): * documented hiv infection * age \<50 at study entry\* * korean ethnicity * likely route of hiv acquisition via sexual exposure by male to male exposure * able to comprehend study patient information leaflet \* this group will comprise of at least 70 subjects in each of the following age groups: 20-29, 30-39, 40-49 years. recruitment will be monitored by the study monitoring team 3. hiv-negative cohort (n=250): * documented negative hiv test at screening * age \>50 years at study entry * korean ethnicity * self reported sexual preferences of men who have sex with men to enroll matched control, we will try to match age, sexual orientation, and participating clinic. exclusion criteria: * in the opinion of the investigator, those unable or unwilling to comply with the requirements of the study * life expectancy less than 6 months

Keywords: hiv aging comorbidity non-communicable diseases