Evidence map›Paper›PMID 17604301›Full record

ArticleBMJ (Clinical research ed.)2007

Accuracy of reading liquid based cytology slides using the ThinPrep Imager compared with conventional cytology: prospective study.

Elizabeth Davey, Jefferson d'Assuncao, Les Irwig, Petra Macaskill, Siew F Chan, Adele Richards, Annabelle Farnsworth

Abstract readComparative Study
In one paragraph

Article in BMJ (Clinical research ed.), 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

32 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  19. Multimodal entity coreference for cervical dysplasia diagnosis.IEEE transactions on medical imaging · 2015
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Elizabeth DaveyScreening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia. daveye@health.usyd.edu.au
Jefferson d'Assuncao
Les Irwig
Petra Macaskill
Siew F Chan
Adele Richards
Annabelle Farnsworth

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo compare the accuracy of liquid based cytology using the computerised ThinPrep Imager with that of manually read conventional cytology.

designProspective study.

settingPathology laboratory in Sydney, Australia.

participants55,164 split sample pairs (liquid based sample collected after conventional sample from one collection) from consecutive samples of women choosing both types of cytology and whose specimens were examined between August 2004 and June 2005.

main outcome measuresPrimary outcome was accuracy of slides for detecting squamous lesions. Secondary outcomes were rate of unsatisfactory slides, distribution of squamous cytological classifications, and accuracy of detecting glandular lesions.

resultsFewer unsatisfactory slides were found for imager read cytology than for conventional cytology (1.8% v 3.1%; P<0.001). More slides were classified as abnormal by imager read cytology (7.4% v 6.0% overall and 2.8% v 2.2% for cervical intraepithelial neoplasia of grade 1 or higher). Among 550 patients in whom imager read cytology was cervical intraepithelial neoplasia grade 1 or higher and conventional cytology was less severe than grade 1, 133 of 380 biopsy samples taken were high grade histology. Among 294 patients in whom imager read cytology was less severe than cervical intraepithelial neoplasia grade 1 and conventional cytology was grade 1 or higher, 62 of 210 biopsy samples taken were high grade histology. Imager read cytology therefore detected 71 more cases of high grade histology than did conventional cytology, resulting from 170 more biopsies. Similar results were found when one pathologist reread the slides, masked to cytology results.

conclusionThe ThinPrep Imager detects 1.29 more cases of histological high grade squamous disease per 1000 women screened than conventional cytology, with cervical intraepithelial neoplasia grade 1 as the threshold for referral to colposcopy. More imager read slides than conventional slides were satisfactory for examination and more contained low grade cytological abnormalities.

Indexed as

BiopsyCarcinoma, Squamous CellCytological TechniquesEvaluation Studies as TopicFemaleHumansImage Interpretation, Computer-AssistedProspective StudiesSensitivity and SpecificityUterine Cervical DysplasiaUterine Cervical NeoplasmsVaginal Smears

Identifiers

PMID17604301
PMCPMC1910624

What OpenQuestion holds

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Registered trials

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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.