TY - JOUR
KW - Young Adult
KW - Trichiasis
KW - Trachoma
KW - Sample Size
KW - Prevalence
KW - Middle Aged
KW - Kenya
KW - Humans
KW - Health Surveys
KW - Geographic Information Systems
KW - Aged, 80 and over
KW - Aged
KW - Age Distribution
KW - Adult
KW - Adolescent
AU - Jefitha K
AU - Hillary R
AU - Mesurier RL
AU - Mwanthi M
AU - Keeffe J
AB - <p><strong>INTRODUCTION: </strong>A survey to determine the prevalence of trachomatous trichiasis (TT) requires a large sample size and the recommended participant age is ≥15 years. This study sought to establish the appropriate age range of individuals to be included in TT surveys.</p>

<p><strong>METHODS: </strong>Data from six previous surveys of adults ≥15 years old were reanalysed.</p>

<p><strong>RESULTS: </strong>Reanalysis indicated that 69.6-93.3% (average 87.0%) of untreated TT occurred in those aged 40+ years and 52.2-86.7% (average 73.1%) in those aged 50+ years (age ≥50 years is used in rapid assessment of avoidable blindness). Age ≥40 years was adopted in a TT survey conducted in Turkana district because it allowed a smaller sample size than age ≥15 years.</p>

<p><strong>CONCLUSIONS: </strong>The estimated backlog of untreated TT in people aged ≥40 years old in Turkana was 5932 and the overall TT backlog was likely to be 6358-8523. These findings cannot be generalised because all surveys were carried out in the same country.</p>

BT - The British journal of ophthalmology
C1 - <p>http://www.ncbi.nlm.nih.gov/pubmed/21515567?dopt=Abstract</p>

DO - 10.1136/bjo.2010.193268
IS - 8
J2 - Br J Ophthalmol
LA - eng
N2 - <p><strong>INTRODUCTION: </strong>A survey to determine the prevalence of trachomatous trichiasis (TT) requires a large sample size and the recommended participant age is ≥15 years. This study sought to establish the appropriate age range of individuals to be included in TT surveys.</p>

<p><strong>METHODS: </strong>Data from six previous surveys of adults ≥15 years old were reanalysed.</p>

<p><strong>RESULTS: </strong>Reanalysis indicated that 69.6-93.3% (average 87.0%) of untreated TT occurred in those aged 40+ years and 52.2-86.7% (average 73.1%) in those aged 50+ years (age ≥50 years is used in rapid assessment of avoidable blindness). Age ≥40 years was adopted in a TT survey conducted in Turkana district because it allowed a smaller sample size than age ≥15 years.</p>

<p><strong>CONCLUSIONS: </strong>The estimated backlog of untreated TT in people aged ≥40 years old in Turkana was 5932 and the overall TT backlog was likely to be 6358-8523. These findings cannot be generalised because all surveys were carried out in the same country.</p>

PY - 2011
SP - 1058
EP - 60
T2 - The British journal of ophthalmology
TI - What is the appropriate age range of individuals to be included in a survey to estimate the prevalence of trachomatous trichiasis?
VL - 95
SN - 1468-2079
ER -