Document Detail

Serum retinol and xerophthalmia among a prison population in papua new Guinea.
MedLine Citation:
PMID:  22053839     Owner:  NLM     Status:  In-Data-Review    
Purpose: To estimate the prevalence of vitamin A deficiency (VAD) and one of its clinical manifestations, xerophthalmia, and examine the predictive value of nyctalopia and ocular signs for serum retinol concentrations among a prison population in Papua New Guinea. Methods: A cross-sectional study of 148 prisoners and 9 guards; all males aged ≥18 years. Interview-based questionnaire; ocular examination; serum retinol concentration determination. Results: Two guards had marginal (retinol <1.05-≥0.70 µmol/L) VAD. For prisoners: mean retinol was 0.84 ± 0.49 µmol/L; 43.9% (95% CI 35.9, 52.2) had VAD (retinol <0.70 µmol/L); 9.6% (95% CI 5.1, 17.0) self-reported nyctalopia prior to, and 36.1% (95% CI 27.7, 45.5) after incarceration; 10.9% (95% CI 6.7, 17.0) exhibited at least one sign of xerophthalmia (2 had fundus changes; all 4 with more than conjunctival xerosis alone had severe [<0.35 µmol/L] retinol deficiency). Prisoners with ocular signs were more likely than those without to have VAD (OR 10.4; 95% CI 2.5, 70.3; P < 0.001) and severe retinol deficiency (OR 19.1; 95% CI 5.5, 77.2; P < 0.001). Positive (PPV) and Negative (NPV) Predictive Values: of nyctalopia for any (PPV 62.9%; NPV 32.8%) and severe (PPV 25.7%; NPV 85.9%) retinol deficiency; of ocular signs for any (PPV 93.3%; NPV 38.2%) and severe (PPV 73.1%; NPV 87.8%) retinol deficiency, and VAD (PPV 86.5%, NPV 38.2%). Conclusions: VAD and xerophthalmia were present in this prison population. There may be VAD in the wider community. The former needs remedy and the latter deserves investigation. Self-reported nyctalopia was not a useful indicator of retinol deficiency. Absence of ocular signs was unhelpful for ruling out VAD.
Garry Brian; Benoit Tousignant; Bernard J Venn; Robert McKay; Camilla Gould
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ophthalmic epidemiology     Volume:  18     ISSN:  1744-5086     ISO Abbreviation:  Ophthalmic Epidemiol     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-11-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9435674     Medline TA:  Ophthalmic Epidemiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  288-94     Citation Subset:  IM    
The Fred Hollows Foundation New Zealand , Auckland , New Zealand.
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