Validity

Validity of peptic ulcer disease and upper gastrointestinal bleeding diagnoses in administrative databases: a systematic review protocol
Alessandro Montedori, Iosief Abraha, Carlos Chiatti, Francesco Cozzolino, Massimiliano Orso, Maria Laura Luchetta, Joseph M Rimland, Giuseppe Ambrosio

BMJ Open Sep 2016, 6 (9) e011776; DOI: 10.1136/bmjopen-2016-011776
Validation of the American Orthopaedic Foot and Ankle Society Ankle-Hindfoot Scale Dutch language version in patients with hindfoot fractures
A Siebe De Boer, Duncan E Meuffels, Cornelis H Van der Vlies, P Ted Den Hoed, Wim E Tuinebreijer, Michael H J Verhofstad, Esther M M Van Lieshout

BMJ Open Nov 2017, 7 (11) e018314; DOI: 10.1136/bmjopen-2017-018314
Glycated haemoglobin A_1c (HbA_1c) for detection of diabetes mellitus and impaired fasting glucose in Malawi: a diagnostic accuracy study
Sujit D Rathod, Amelia C Crampin, Crispin Musicha, Ndoliwe Kayuni, Louis Banda, Jacqueline Saul, Estelle McLean, Keith Branson, Shabbar Jaffar, Moffat J Nyirenda

BMJ Open May 2018, 8 (5) e020972; DOI: 10.1136/bmjopen-2017-020972
Accuracy of lung cancer ICD-9-CM codes in Umbria, Napoli 3 Sud and Friuli Venezia Giulia administrative healthcare databases: a diagnostic accuracy study
Alessandro Montedori, Ettore Bidoli, Diego Serraino, Mario Fusco, Gianni Giovannini, Paola Casucci, David Franchini, Annalisa Granata, Valerio Ciullo, Maria Francesca Vitale, Michele Gobbato, Rita Chiari, Francesco Cozzolino, Massimiliano Orso, Walter Orlandi, Iosief Abraha

BMJ Open May 2018, 8 (5) e020628; DOI: 10.1136/bmjopen-2017-020628
Validating malignant melanoma ICD-9-CM codes in Umbria, ASL Napoli 3 Sud and Friuli Venezia Giulia administrative healthcare databases: a diagnostic accuracy study
Massimiliano Orso, Diego Serraino, Iosief Abraha, Mario Fusco, Gianni Giovannini, Paola Casucci, Francesco Cozzolino, Annalisa Granata, Michele Gobbato, Fabrizio Stracci, Valerio Ciullo, Maria Francesca Vitale, Paolo Eusebi, Walter Orlandi, Alessandro Montedori, Ettore Bidoli

BMJ Open Apr 2018, 8 (4) e020631; DOI: 10.1136/bmjopen-2017-020631
Strengths and Difficulties Questionnaire: internal validity and reliability for New Zealand preschoolers
Paula Kersten, Alain C Vandal, Hinemoa Elder, Kathryn M McPherson

BMJ Open Apr 2018, 8 (4) e021551; DOI: 10.1136/bmjopen-2018-021551
Psychometric properties of gross motor assessment tools for children: a systematic review
Alison Griffiths, Rachel Toovey, Prue E Morgan, Alicia J Spittle

BMJ Open Oct 2018, 8 (10) e021734; DOI: 10.1136/bmjopen-2018-021734
Accuracy of administrative databases in detecting primary breast cancer diagnoses: a systematic review
Iosief Abraha, Alessandro Montedori, Diego Serraino, Massimiliano Orso, Gianni Giovannini, Valeria Scotti, Annalisa Granata, Francesco Cozzolino, Mario Fusco, Ettore Bidoli

BMJ Open Jul 2018, 8 (7) e019264; DOI: 10.1136/bmjopen-2017-019264
Sensitivity and specificity of breast cancer ICD-9-CM codes in three Italian administrative healthcare databases: a diagnostic accuracy study
Iosief Abraha, Diego Serraino, Alessandro Montedori, Mario Fusco, Gianni Giovannini, Paola Casucci, Francesco Cozzolino, Massimiliano Orso, Annalisa Granata, Marcello De Giorgi, Paolo Collarile, Rita Chiari, Jennifer Foglietta, Maria Francesca Vitale, Fabrizio Stracci, Walter Orlandi, Ettore Bidoli

BMJ Open Jul 2018, 8 (7) e020627; DOI: 10.1136/bmjopen-2017-020627
The Norwegian patient experiences with GP questionnaire (PEQ-GP): reliability and construct validity following a national survey
Olaf Holmboe, Hilde Hestad Iversen, Kirsten Danielsen, Oyvind Bjertnaes

BMJ Open Sep 2017, 7 (9) e016644; DOI: 10.1136/bmjopen-2017-016644

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