Table 3.

Errors (Incorrect and Missing Data) by Field Type* and by Group Assignment

Field Types (N = 4900)	Data Elements	Errors		Totals (%)
Field Types (N = 4900)	Data Elements	Short-form Group^†	Long-form Group^‡	Totals (%)
Numeric (n = 2450)	Age	2	15
	Weight	12	34
	Blood Pressure	0	5
	A1C	23	29
	Creatinine	26	37
	Numeric subtotal			183 (7.5%)
Date (n = 980)	Birth date	15	9	24
	Visit date	13	6	19
	Date subtotal			43 (4.4%)
Text (n = 490)	Name	28	56	84
	Text subtotal			84 (17.1%)
Select Option (n = 980)	Pregnant	12	34	45
	Gender	1	1	2
	Select subtotal			47 (4.9%)
	Total			357 (7.3%)

* Field types are groups of data elements with common characteristics. The MOCC Trial case report forms contained numeric fields (numbers only), date fields (numbers in specific date formatting), text fields (alphabetic characters), and select option fields (choice of options from a menu).
† Forty-eight participants entered 10 data items for 5 cases for a total of 2400 data fields.
‡ Fifty participants entered 10 data items for 5 cases for a total of 2500 data fields.