Medline
Obesity	(MH ‘obesity’) OR (MH ‘overweight’) OR obes* OR overweight* OR malnutrition OR ‘body mass index*’ OR ‘BMI’ OR ‘waist‐hip ratio*’ OR ‘waist hip ratio*’ OR ‘waist circumference’ OR ‘abdominal fat’
	AND
Case‐identification method validation	(MH ‘Sensitivity and Specificity’) OR specificit* OR sensitivit* OR ‘predictive value*’ OR ‘positive predictive value*’ OR ‘ppv’ OR ‘negative predictive value*’ OR ‘npv’ OR valid* OR ‘roc curve*’ OR ‘roc’ OR ‘receiver operating characteristic*’ OR ‘auc’ OR ‘area under curve*’ OR kappa*
	AND
Administrative data	(MH ‘Health Information Systems’) OR (MH ‘Billing and Claims’) OR (MH ‘Coding’) OR (MH ‘Databases, Factual’) OR ‘administrative data*’ OR ‘medico‐administrative data*’ OR ‘administrative register data*’ OR ‘health* administrative data*’ OR ‘administrative code*’ OR ‘medico‐administrative code*’ OR ‘health* administrative code*’ OR ‘health* data*’ OR ‘billing data*’ OR ‘billing code*’ OR claim*

CINAHL, PsycINFO, Abstract in Social Gerontology, Ageline
Obesity	obes* OR overweight* OR malnutrition OR ‘mass index*’ OR ‘BMI’ OR ‘waist‐hip ratio*’ OR ‘waist hip ratio*’ OR ‘waist circumference’ OR ‘abdominal fat’
	AND
Case‐identification method validation	specificit* OR sensitivit* OR ‘predictive value*’ OR ‘positive predictive value*’ OR ‘ppv’ OR ‘negative predictive value*’ OR ‘npv’ OR valid* OR ‘roc curve*’ OR ‘roc’ OR ‘receiver operating characteristic*’ OR ‘auc’ OR ‘area under curve*’ OR kappa*
	AND
Administrative data	‘administrative data*’ OR ‘medico‐administrative data*’ OR ‘administrative register data*’ OR ‘health* administrative data*’ OR ‘administrative code*’ OR ‘medico‐administrative code*’ OR ‘health* administrative code*’ OR ‘health* data*’ OR ‘billing data*’ OR ‘billing code*’ OR claim*

Pubmed
Obesity	obesity OR obese OR overweight OR overweighted OR malnutrition OR ‘body mass index’ OR ‘body mass indexes’ OR bmi OR ‘waist‐hip ratio’ OR ‘waist hip ratio’ OR ‘waist circumference’ OR ‘abdominal fat’
	AND
Case‐identification method validation	specificity OR sensitivity OR ‘predictive value’ OR ‘predictive values’ OR ‘positive predictive value’ OR ‘positive predictive values’ OR ‘ppv’ OR ‘negative predictive value’ OR ‘negative predictive values’ OR ‘npv’ OR validation OR validity OR ‘roc curve’ OR ‘roc curves’ OR ‘roc’ OR ‘receiver operating characteristic’ OR ‘receiver operating characteristics’ OR ‘auc’ OR ‘area under curve’ OR ‘area under curves’ OR kappa OR kappas
	AND
Administrative data	‘administrative data’ OR ‘administrative database’ OR ‘medico‐administrative data’ OR ‘medico‐administrative database’ OR ‘administrative register data’ OR ‘administrative register database’ OR ‘healthcare administrative data’ OR ‘healthcare administrative database’ OR ‘healthcare administrative data’ OR ‘healthcare administrative database’ OR ‘administrative code’ OR ‘administrative codes’ OR ‘medico‐administrative code’ OR ‘medico‐administrative codes’ OR ‘healthcare administrative code’ OR ‘healthcare administrative codes’ OR ‘healthcare administrative code’ OR ‘healthcare administrative codes’ OR ‘health data’ OR ‘health database’ OR ‘healthcare data’ OR ‘healthcare database’ OR ‘billing data’ OR ‘billing database’ OR ‘billing code’ OR ‘billing codes’ OR claim OR claims

Embase
Obesity	‘obesity’/exp OR ‘obese*’:ti,ab,kw OR ‘obesit*’:ti,ab,kw OR ‘overweight’:ti,ab,kw OR ‘overweighted’:ti,ab,kw OR ‘malnutrition’:ti,ab,kw OR ‘body mass index*’:ti,ab,kw OR ‘bmi’:ti,ab,kw OR (‘waist‐hip’ NEAR/1 ‘ratio*’):ti,ab,kw OR (‘waist hip’ NEAR/1 ‘ratio*’):ti,ab,kw OR (‘waist’ NEAR/1 ‘circumference*’):ti,ab,kw OR ‘abdominal fat’:ti,ab,kw
	AND
Case‐identification method validation	‘sensitivity and specificity’/exp OR ‘predictive value’/exp OR ‘validity’/exp OR ‘receiver operating characteristic’/exp OR ‘area under the curve’/exp OR (‘predictive*’ NEXT/1 ‘value*’):ti,ab,kw OR ‘ppv’:ti,ab,kw OR ‘npv’:ti,ab,kw OR ‘sensitivity’:ti,ab,kw OR ‘specificit*’:ti,ab,kw OR ‘valid*’:ti,ab,kw OR ‘receiver operat* characteristic*’:ti,ab,kw OR ‘roc’:ti,ab,kw OR ‘auc’:ti,ab,kw OR ‘area under curve*’:ti,ab,kw OR ‘kappa*’:ti,ab,kw
	AND
Administrative data	‘administrative database’/exp OR ‘administrative data’/exp OR ‘billing and claims’/exp OR ‘medical information system’/exp OR ‘factual database’/exp OR (‘administrative*’ NEAR/2 ‘data*’):ti,ab,kw OR (‘administrative*’ NEAR/2 ‘code*’):ti,ab,kw OR (‘health*’ NEAR/2 ‘data*’):ti,ab,kw OR (‘billing*’ NEAR/2 ‘data*’):ti,ab,kw OR (‘billing*’ NEAR/2 ‘code*’):ti,ab,kw OR (‘billing*’ NEAR/2 ‘billing*’):ti,ab,kw OR claim:ti,ab,kw OR claims:ti,ab,kw