Evidence map›Paper›PMID 19738173›Full record

ArticleNeurology2009

Neurologic abnormalities in HTLV-I- and HTLV-II-infected individuals without overt myelopathy.

H H Biswas, J W Engstrom, Z Kaidarova, G Garratty, J W Gibble, B H Newman, J W Smith, A Ziman, J L Fridey, R A Sacher and 1 more

Open access · bronzeAbstract readComparative StudyMulticenter Study
In one paragraph

Article in Neurology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.5field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 67 citations in OpenAlex.

  1. Observational
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  7. First Description of Seronegative HTLV-1 Carriers in Argentina.The American journal of tropical medicine and hygiene · 2020
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  20. Pathways of cell-cell transmission of HTLV-1.Frontiers in microbiology · 2012
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 3 institutions in 1 country.

H H BiswasBlood Systems Research Institute, San Francisco, CA, USA.
J W Engstrom
Z Kaidarova
G Garratty
J W Gibble
B H Newman
J W Smith
A Ziman
J L Fridey
R A Sacher
E L Murphy
Blood Systems Research Institute · USAmerican Red Cross · USOklahoma Blood Institute · US

Funding

Pathophysiology of HTLV-I and HTLV-II InfectionR01HL062235 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MURPHY, EDWARD L · 1999 to 2008
$8.4M
Health Outcomes in Blood Donors and RecipientsK24HL075036 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MURPHY, EDWARD L · 2004 to 2013
$1.6M
NHLBI NIH HHS 2R01-HL-62235NHLBI NIH HHS K24-HL-75036
6 · The paper itself

Abstract

backgroundHuman T-lymphotropic virus (HTLV) type I is the causative agent of HTLV-associated myelopathy (HAM)/tropical spastic paraparesis, and a number of HAM cases with HTLV-II infection have also been reported. However, despite some reports, it is unclear whether HTLV-I or -II infection is associated with other neurologic manifestations.

methodsAn analysis of medical histories and screening neurologic examinations from a prospective cohort of 153 HTLV-I, 388 HTLV-II, and 810 HTLV-seronegative individuals followed up for means of 11.5, 12.0, and 12.2 years was performed. Participants diagnosed with HAM were excluded. We calculated odds ratios (ORs) and 95% confidence intervals (CIs), adjusting for age, sex, race or ethnicity, income, educational attainment, body mass index, alcohol and cigarette consumption, injection drug use, diabetes, and hepatitis C virus status, using generalized estimating equations for repeated measures.

resultsHTLV-I and -II participants were more likely than seronegative participants to have leg weakness (ORs 1.67 [95% CI 1.28-2.18] and 1.44 [1.16-1.78]), impaired tandem gait (ORs 1.25 [95% CI 1.07-1.47] and 1.45 [1.27-1.64]), Babinski sign (ORs 1.54 [95% CI 1.13-2.08] and 1.51 [1.18-1.93]), impaired vibration sense (ORs 1.16 [95% CI 1.01-1.33] and 1.27 [1.14-1.42]), and urinary incontinence (ORs 1.45 [95% CI 1.23-1.72] and 1.70 [1.50-1.93]). For both HTLV-I and -II participants, higher odds of sensory neuropathy by monofilament examination were no longer significant after adjustment for confounding.

conclusionsThese results provide strong evidence that human T-lymphotropic virus (HTLV)-I and -II are associated with a spectrum of predominantly motor abnormalities in patients without overt HTLV-associated myelopathy. Further investigation of the clinical course and etiology of these abnormalities is warranted.

Indexed as

Human T-lymphotropic virus 1Human T-lymphotropic virus 2Motor Skills DisordersNervous System DiseasesParaparesis, Tropical SpasticAdolescentAdultAgedCohort StudiesFemaleFollow-Up StudiesHTLV-II InfectionsHTLV-I InfectionsHumansMaleMiddle Aged

Identifiers

PMID19738173
PMCPMC2739606
OpenAlexW2010535061

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.