Table 3. Comparison of the Proportion of Individuals With Completed COVID-19 Vaccine Series From Linked IIS and Claims Data, CDC, DOH, and Capture-Recapture Analysis.

State No.	Age group used for row, ya	Linked IIS and claims data vaccination estimate, No. (%)	CDC vaccination estimate, %b	% Underrecordingc	State DOH vaccination estimate, %b	% Underrecordingc	Capture-recapture analysis vaccination estimate, No. (%)d	% Underrecordingc,d
1	0-64	287 198 (44.6)	51.0	12.5	NAe	NAe	347 045 (53.9)	17.3
2	0-64	68 478 (43.3)	49.7	12.9	NAe	NAe	84 447 (53.3)	18.8
3	5-64	404 978 (37.6)	69.3	45.7	70.8	46.9	824 768 (72.1)	50.9
4	0-64	228 643 (32.8)	50.7	35.3	NAe	NAe	341 313 (49.0)	33.1
5	5-64	365 789 (49.1)	65.4	24.9	62.0	20.8	471 860 (60.0)	22.3
6	0-64	144 224 (45.4)	73.1	37.9	71.7	36.7	203 222 (63.9)	29.0
7	5-64	180 277 (58.2)	66.2	12.1	64.0	9.1	202 795 (61.4)	11.1
8	5-64	159 720 (46.7)	63.3	26.2	52.1	10.4	217 222 (60.3)	26.5
9	0-64	36 876 (42.1)	74.5	43.5	65.2	35.4	55 858 (63.7)	33.9
10	5-64	95 374 (47.3)	56.6	16.4	56.1	15.7	125 112 (56.9)	23.7
11	12-64	120 678 (54.7)	76.6	28.6	70.5	22.4	159 174 (62.6)	22.8

Abbreviations: CDC, Centers for Disease Control and Prevention; DOH, Department of Health; IIS, Immunization Information Systems; NA, not applicable.

^a Some states cover age groups 5 to 64 years or 12 to 64 years because those were the age ranges available for the age-specific DOH data.

^b Counts were not provided because they were not consistently available on the websites for the external sources.

^c Percentage of underrecording was calculated as the difference between the linked IIS and claims data estimate and the comparison estimate divided by the comparison estimate.

^d Estimates for this column were for ages 0 to 64 years. All other columns were restricted to the ages indicated for each row unless otherwise specified.

^e Age-specific vaccination estimates were not available on the state websites for states 1, 2, and 4, which precluded age standardization and subsequent inclusion in this table.