Table 2.

Returned Form Items With Errors of Omission, by Site and Type of Form

Site	Paper No. (%)	Electronic No. (%)
Paper-first group
A	3/727 (0.4)	6/547 (1.1)
D	6/760 (0.8)	2/740 (0.3)
E	14/737 (1.9)	6/522 (1.1)
F	12/760 (1.6)	1/714 (0.1)
H	27/767 (3.5)	0/781 (0.0)
J	55/764 (7.2)	0/121 (0.0)
O	3/808 (0.4)	2/735 (0.3)
P	2/752 (0.3)	6/774 (0.8)
R	34/757 (4.5)	5/604 (0.8)
S	14/777 (1.8)	2/876 (0.2)
Total	170/7,609 (2.2)	30/6,414 (0.5)
Electronic-first group
B	10/777 (1.3)	0/771 (0.0)
C	67/774 (8.7)	NAa
G	100/670 (14.9)	0/689 (0.0)
I	81/585 (13.8)	5/699 (0.7)
K	NAb	0/800 (0.0)
L	9/750 (1.2)	0/799 (0.0)
M	6/806 (0.7)	6/864 (0.7)
N	20/764 (2.6)	NAc
Q	6/823 (0.7)	2/799 (0.3)
Total	299/5,949 (5.0)	13/5,421 (0.2)
Overall total	469/13,558 (3.5)	43/11,835 (0.4)

NA = not applicable.

Note: Not all sites returned 60 forms as specified in the protocol, and the number of items per form varied because of skip patterns.

^a Handheld computer was lost/stolen before data collection.

^b No paper forms were returned because of staffing difficulties.

^c Handheld computer was lost/stolen after data collection.