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BLOODI
Percentage of Indian blood, Indian schedules
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Description

BLOODI describes the proportion of Indian blood reported by those with a race of Indian.

Users should note that these entries were not always consistent with the individual's recorded race, and as such this information is not used when constructing RACE codes.

See also BLOODW and BLOODB for the percentage of White and Negro blood.

Codes

BLOODI is a 4-digit numeric variable used in the 1910 and 1930 Census to indicate the percentage of Indian blood reported by those with a race of Indian (See also BLOODW and BLOODB for the percentage of White and Negro blood). BLOODI has one implied decimal. For example, a BLOODI value of 0227 should be interpreted as 22.7. BLOODI specific variable codes for missing, edited, or unidentified observations, observations not applicable (N/A), observations not in universe (NIU), top and bottom value coding, etc. are provided below if applicable by Census year (and data sample if specified).

BLOODI Specific Variable Codes
0000 = Not applicable or 0% Indian blood.
1000 = Full blood
9995 = Mixed blood, but percentage not specified
9999 = Not classifiable or blank.

Comparability

The modified schedule used to enumerate American Indians in 1910 contained a section labeled "Proportion of Indian and other blood," with individual fields labeled "Indian," "White," and "Negro."

The 1910 enumerator instructions stated "If the Indian is full-blood, write 'full' in column 36, and leave columns 37 and 38 blank. If the Indian is of mixed blood, write in columns 36, 37, and 38 the fractions which show the proportions of Indian and other blood, as (column 36, Indian) 1/2, (column 37, white) 1/2, and (column 38, negro) 0. For Indians of mixed blood all three columns should be filled, and the sum, in each case, should equal 1, as 1/2, 0, 1/4, 3/4, 0, 1/8, etc."

Enumerators in 1910 entered a wide variety of fractions in response to this question. We converted the fractions to a percentage, with the last digit being an implied decimal. Thus 3/8 = 375 (i.e., 37.5). Values of BLOODI range from 0 (no American Indian blood) to 1000 (presumably meaning all American Indian blood).

In 1930, for those who reported their race as "Indian", enumerators were instructed to report whether "full blood" or "mixed blood. Some enumerators recorded proportions instead of "full" or "mixed". In these cases the proportions were preserved "as is".

Universe

  • 1910: Persons enumerated on American Indian schedules (sample 4 in SAMP1910); not available for Puerto Rico.
  • 1930: Persons whose race was enumerated as Indian

Availability

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  • 1930: 1%; 5%
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  • 1910: 1%; 1.4% ovrsmp
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Editing Procedure

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