User Satisfaction Evaluation of the EHR4CR Query Builder: A Multisite Patient Count Cohort System

Table 1

Queries construction.

	Query 1		Query 2		Query 3
	Criterion	Temporal constraints	Criterion	Temporal constraints	Criterion	Temporal constraints
Inclusion criteria
Gender	Female	—	—	—	—	—
Age	>50 years	—	>18 years	—	>18 years	—
Diagnosis	—	—	Non-insulin-dependent diabetes mellitus	—	Heart failure	At most 3 years before the query
Lab values	—	—	Body mass index	—	Left ventricular ejection fraction <40%	At most 14 months before the query
	—	—	Haemoglobin A1c > 7,5%	—	Systolic blood pressure >2,0 mmHg	2 times separated with at least 2 months in between
Exclusion criteria
Diagnosis	—	—	Acute myocardial infarction	—	Cardiomyopathy in the puerperium	Between 0 and 5 months before the heart failure
	—	—	—	—	Acute myocardial infarction	Between 5 and 30 months before now
	—	—	—	—	Percutaneous coronary intervention	Between 5 and 30 months before now
	—	—	—		Operation on heart	Between 5 and 30 months before now
Treatment	—	—	Using insulin and analogues	—	Vasodilators used in cardiac diseases	—
	—	—	—	—	Phosphodiesterase inhibitors	—
	—	—	—	—	Cardiac stimulants	—

This table shows criteria composing each query. Users had to construct queries following this pattern in order to find the number of patients corresponding to the set of criteria.