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HIV InfectionsNCT00411983

A Long-term Follow-up of the HIV-NAT Cohort

An observational study of HIV Infections, run by The HIV Netherlands Australia Thailand Research Collaboration at 1 site in Thailand.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

With HIV/AIDS increasingly considered a chronic disease, 24-, or 48-week data from antiretroviral studies are no longer sufficient. Only with long-term follow-up and outcome data will shed some much-needed light on the answers of questions that have stumped us for several years. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
HIV Infections
How many people
10,000 participants
Where
1 siteThailand
Study dates
Nov 2002to Dec 2030
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: All HIV infected adult patients from HIV-NAT.

Who may be able to join

  • HIV infected patients( children and adults) previously participated HIV-NAT studies
  • HIV infected patients( children and adults) currently participate in HIV-NAT trials
  • Able to provide written consent

Who cannot join

  • Unable to provide written consent

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Anchalee Avihingsanon, MD, PhD contact

66 2 2557334-5 ext. 107

anchalee.a@hivnat.org

Stephen Kerr, PhD contact

66 2 2557334-5 ext. 138

s.kerr@unsw.edu.au

Thailand1 site, 1 recruiting

  • HIV-NAT, Thai Red Cross AIDS Research Center

    Bangkok, 10330

    Praphan Phanuphak, MD, PhD

    Recruiting

Other trials in Thailand

About this study

Official title: A Long-term Follow-up Study for HIV-infected Individuals Who Have Participated in HIV-NAT Study Protocols

With HIV/AIDS increasingly considered a chronic disease, 24-, or 48-week data from antiretroviral studies are no longer sufficient. Only with long-term follow-up and outcome data will shed some much-needed light on the answers of questions that have stumped us for several years. Data from a large observational cohort of patients treated with combination antiretroviral therapy will provide further insights into the long-term safety and durability of various antiretroviral therapeutic approached, the efficacy of HIV viral load and CD4 cell counts as predictors of disease progression and mortality, and the importance of adherence.

Read the detailed description

Primary Objective:

To collect and evaluate long-term clinical outcomes of HIV infected participants previously enrolled in HIV-NAT trials.

Secondary Objective:

To Assess:

  1. Long-term consequences of initiation of antiretroviral as predicted by baseline CD4 cell count and/or baseline plasma HIV RNA level
  2. Incidence of lipodystrophy and other metabolic complications in three different groups of patients initially treated with NRTI-based regimens, NNRTI-based regimens, or PI-based regimens
  3. Class-specific incidence of lipodystrophy and metabolic complications such as d4T versus AZT, nevirapine versus efavirenz and individual PIs (IDV, SQV, Kaletra, and atazanavir)
  4. Resistance profiles in patients on different antiretroviral regimens
  5. Long-term consequences of antiretroviral agents on cardiovascular, renal, hepatic, and endocrine function, skin, gastrointestinal system and urogentital tract
  6. Incidence of opportunistic infections or malignancy including hepatocarcinoma in patients with HIV/HCV or HIV/HBV co-infection
  7. Immune recovery syndrome
  8. Adherence to different antiretroviral regimens
  9. Quality of life
Conditions
HIV Infections
Keywords
chronic HIV infection, long term cohort of HIV infection
Medical subject headings
HIV Infections

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. HIV infection

    This cohort will collect various information such as but not limited to:

    comorbidity, mortality, cardiovascular, neurological clinical data, treatment history, serious adverse events, PBMCs, clinical outcomes, virological outcomes, resistance, failure, aging, other opportunistic infections, etc

    Measured: 30 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted15 Dec 2006 (estimated)
  2. Study startNov 2002
  3. Primary completionDec 2030 (estimated)
  4. Study completionDec 2030 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
10,000 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00411983
Sponsor's protocol ID
HIV-NAT 006
Status last verified
Sep 2026
First submitted
14 Dec 2006
Last updated
17 Sep 2026
Results posted
No
Data monitoring committee
Yes

Publications

  • Law WP, Duncombe CJ, Mahanontharit A, Boyd MA, Ruxrungtham K, Lange JM, Phanuphak P, Cooper DA, Dore GJ. Impact of viral hepatitis co-infection on response to antiretroviral therapy and HIV disease progression in the HIV-NAT cohort. AIDS. 2004 May 21;18(8):1169-77. doi: 10.1097/00002030-200405210-00010.

    PubMed 15166532

  • Law WP, Dore GJ, Duncombe CJ, Mahanontharit A, Boyd MA, Ruxrungtham K, Lange JM, Phanuphak P, Cooper DA. Risk of severe hepatotoxicity associated with antiretroviral therapy in the HIV-NAT Cohort, Thailand, 1996-2001. AIDS. 2003 Oct 17;17(15):2191-9. doi: 10.1097/00002030-200310170-00007.

    PubMed 14523276

  • Avihingsanon A, Kerr SJ, Punyawudho B, van der Lugt J, Gorowara M, Ananworanich J, Lange JM, Cooper DA, Phanuphak P, Burger DM, Ruxrungtham K. Short communication: Aging not gender is associated with high atazanavir plasma concentrations in Asian HIV-infected patients. AIDS Res Hum Retroviruses. 2013 Dec;29(12):1541-6. doi: 10.1089/aid.2013.0069. Epub 2013 Oct 2.

    PubMed 24088045

  • Clarke A, Kerr S, Honeybrook A, Cooper DA, Avihingsanon A, Duncombe C, Phanuphak P, Ruxrungtham K, Ananworanich J, Kaldor J. Adherence and Risk Behaviour in Patients with HIV Infection Receiving Antiretroviral Therapy in Bangkok. Open Virol J. 2012;6:23-8. doi: 10.2174/1874357901206010023. Epub 2012 Feb 24.

    PubMed 22423306

  • Nuesch R, Srasuebkul P, Ananworanich J, Ruxrungtham K, Phanuphak P, Duncombe C; HIV-NAT Study Team. Monitoring the toxicity of antiretroviral therapy in resource limited settings: a prospective clinical trial cohort in Thailand. J Antimicrob Chemother. 2006 Sep;58(3):637-44. doi: 10.1093/jac/dkl313.

    PubMed 16895939

  • Avihingsanon A, Tongkobpetch S, Kerr SJ, Punyawudho B, Suphapeetiporn K, Gorowara M, Ruxrungtham K, Shotelersuk V. Pharmacogenetic testing can identify patients taking atazanavir at risk for hyperbilirubinemia. J Acquir Immune Defic Syndr. 2015 May 1;69(1):e36-7. doi: 10.1097/QAI.0000000000000540. No abstract available.

    PubMed 25622064

  • Kerr SJ, Punyawudho B, Thammajaruk N, Colbers A, Chaiyahong P, Phonphithak S, Sapsirisavat V, Ruxrungtham K, Burger DM, Avihingsanon A. Factors associated with daily tenofovir exposure in Thai subjects taking combination antiretroviral therapy. AIDS Res Hum Retroviruses. 2015 Apr;31(4):368-74. doi: 10.1089/AID.2014.0249. Epub 2014 Dec 17.

    PubMed 25384393

  • Avihingsanon A, Ramautarsing RA, Suwanpimolkul G, Chetchotisakd P, Bowonwatanuwong C, Jirajariyavej S, Kantipong P, Tantipong H, Ohata JP, Suankratay C, Ruxrungtham K, Burger DM. Ergotism in Thailand caused by increased access to antiretroviral drugs: a global warning. Top Antivir Med. 2014 Jan;21(5):165-8.

    PubMed 24531557

  • Avihingsanon A, Jitmitraparp S, Tangkijvanich P, Ramautarsing RA, Apornpong T, Jirajariyavej S, Putcharoen O, Treeprasertsuk S, Akkarathamrongsin S, Poovorawan Y, Matthews GV, Lange JM, Ruxrungtham K; HIV-NAT125 study team. Advanced liver fibrosis by transient elastography, fibrosis 4, and alanine aminotransferase/platelet ratio index among Asian hepatitis C with and without human immunodeficiency virus infection: role of vitamin D levels. J Gastroenterol Hepatol. 2014 Sep;29(9):1706-14. doi: 10.1111/jgh.12613.

    PubMed 24730732

  • Wattanakul T, Avihingsanon A, Manosuthi W, Punyawudho B. Population pharmacokinetics of nevirapine in Thai HIV-infected patients. Antivir Ther. 2014;19(7):651-60. doi: 10.3851/IMP2741. Epub 2014 Feb 6.

    PubMed 24504545

  • Durier N, Ananworanich J, Apornpong T, Ubolyam S, Kerr SJ, Mahanontharit A, Ferradini L, Ruxrungtham K, Avihingsanon A. Cytomegalovirus viremia in Thai HIV-infected patients on antiretroviral therapy: prevalence and associated mortality. Clin Infect Dis. 2013 Jul;57(1):147-55. doi: 10.1093/cid/cit173. Epub 2013 Mar 19.

    PubMed 23511301

  • Praditpornsilpa K, Avihingsanon A, Chaiwatanarat T, Chaiyahong P, Wongsabut J, Ubolyam S, Chulakadabba A, Avihingsanon Y, Ruxrungtham K, Tunsanga K, Eiam-Ong S, Phanuphak P. Comparisons between validated estimated glomerular filtration rate equations and isotopic glomerular filtration rate in HIV patients. AIDS. 2012 Sep 10;26(14):1781-8. doi: 10.1097/QAD.0b013e328356480d.

    PubMed 22713478

  • Kerr SJ, Duncombe C, Avihingsanon A, Ananworanich J, Boyd M, Sopa B, Medtech B, Chuenyam T, Cooper DA, Lange JM, Phanuphak P, Ruxrungtham K. Dyslipidemia in an Asian population after treatment for two years with protease inhibitor-containing regimens. J Int Assoc Physicians AIDS Care (Chic). 2007 Mar;6(1):36-46. doi: 10.1177/1545109706295946.

    PubMed 17329503

  • Avihingsanon A, Avihingsanon Y, Darnpornprasert P, Kerr S, Ungsedhapand C, Duncombe C, Ubolyam S, Ruxrungtham K, Phanuphak P. High prevalence of indinavir-associated renal complications in Thai HIV-infected patients. J Med Assoc Thai. 2006 Aug;89 Suppl 2:S21-7.

    PubMed 17044450

  • Amornritvanich P, Siwamogsatham S, Chattranukulchai P, Tumkosit M, Apornpong T, Lwin HMS, Hiranburana N, Jarusyingdumrong Y, Han WM, Kerr S, Avihingsanon A. Prognostic value of ankle-brachial index and cardio-ankle vascular index for mortality and cardiovascular events in older people with HIV on long-term ART. HIV Med. 2026 Aug;27(8):1277-1286. doi: 10.1111/hiv.70244. Epub 2026 Apr 23.

    PubMed 42026876

Questions about this trial

What is this clinical trial studying?

An observational study of HIV Infections, run by The HIV Netherlands Australia Thailand Research Collaboration at 1 site in Thailand.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 17 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Thailand. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Anchalee Avihingsanon, MD, PhD (66 2 2557334-5 ext. 107, anchalee.a@hivnat.org), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

HIV infection (time frame: 30 years). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00411983, which also lists 21 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Sep 2026.

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A Long-term Follow-up of the HIV-NAT Cohort | AzTrials