Data Dictionary - Census 2010 - Summary File 1

Data Dictionary:

Census 2010

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Survey: Census 2010

Data Source:

Census Bureau; Social Explorer

Data set: Summary File 1 (SF1)

Table:

PCT12G. Sex By Age (Two Or More Races) [209]

Universe: People who are Two or More Races

Table Details

PCT12G.

Sex By Age (Two Or More Races)

Universe: People who are Two or More Races

Variable	Label
PCT012G001	Total:
PCT012G002	Male:
PCT012G003	Under 1 year
PCT012G004	1 year
PCT012G005	2 years
PCT012G006	3 years
PCT012G007	4 years
PCT012G008	5 years
PCT012G009	6 years
PCT012G010	7 years
PCT012G011	8 years
PCT012G012	9 years
PCT012G013	10 years
PCT012G014	11 years
PCT012G015	12 years
PCT012G016	13 years
PCT012G017	14 years
PCT012G018	15 years
PCT012G019	16 years
PCT012G020	17 years
PCT012G021	18 years
PCT012G022	19 years
PCT012G023	20 years
PCT012G024	21 years
PCT012G025	22 years
PCT012G026	23 years
PCT012G027	24 years
PCT012G028	25 years
PCT012G029	26 years
PCT012G030	27 years
PCT012G031	28 years
PCT012G032	29 years
PCT012G033	30 years
PCT012G034	31 years
PCT012G035	32 years
PCT012G036	33 years
PCT012G037	34 years
PCT012G038	35 years
PCT012G039	36 years
PCT012G040	37 years
PCT012G041	38 years
PCT012G042	39 years
PCT012G043	40 years
PCT012G044	41 years
PCT012G045	42 years
PCT012G046	43 years
PCT012G047	44 years
PCT012G048	45 years
PCT012G049	46 years
PCT012G050	47 years
PCT012G051	48 years
PCT012G052	49 years
PCT012G053	50 years
PCT012G054	51 years
PCT012G055	52 years
PCT012G056	53 years
PCT012G057	54 years
PCT012G058	55 years
PCT012G059	56 years
PCT012G060	57 years
PCT012G061	58 years
PCT012G062	59 years
PCT012G063	60 years
PCT012G064	61 years
PCT012G065	62 years
PCT012G066	63 years
PCT012G067	64 years
PCT012G068	65 years
PCT012G069	66 years
PCT012G070	67 years
PCT012G071	68 years
PCT012G072	69 years
PCT012G073	70 years
PCT012G074	71 years
PCT012G075	72 years
PCT012G076	73 years
PCT012G077	74 years
PCT012G078	75 years
PCT012G079	76 years
PCT012G080	77 years
PCT012G081	78 years
PCT012G082	79 years
PCT012G083	80 years
PCT012G084	81 years
PCT012G085	82 years
PCT012G086	83 years
PCT012G087	84 years
PCT012G088	85 years
PCT012G089	86 years
PCT012G090	87 years
PCT012G091	88 years
PCT012G092	89 years
PCT012G093	90 years
PCT012G094	91 years
PCT012G095	92 years
PCT012G096	93 years
PCT012G097	94 years
PCT012G098	95 years
PCT012G099	96 years
PCT012G100	97 years
PCT012G101	98 years
PCT012G102	99 years
PCT012G103	100 to 104 years
PCT012G104	105 to 109 years
PCT012G105	110 years and over
PCT012G106	Female:
PCT012G107	Under 1 year
PCT012G108	1 year
PCT012G109	2 years
PCT012G110	3 years
PCT012G111	4 years
PCT012G112	5 years
PCT012G113	6 years
PCT012G114	7 years
PCT012G115	8 years
PCT012G116	9 years
PCT012G117	10 years
PCT012G118	11 years
PCT012G119	12 years
PCT012G120	13 years
PCT012G121	14 years
PCT012G122	15 years
PCT012G123	16 years
PCT012G124	17 years
PCT012G125	18 years
PCT012G126	19 years
PCT012G127	20 years
PCT012G128	21 years
PCT012G129	22 years
PCT012G130	23 years
PCT012G131	24 years
PCT012G132	25 years
PCT012G133	26 years
PCT012G134	27 years
PCT012G135	28 years
PCT012G136	29 years
PCT012G137	30 years
PCT012G138	31 years
PCT012G139	32 years
PCT012G140	33 years
PCT012G141	34 years
PCT012G142	35 years
PCT012G143	36 years
PCT012G144	37 years
PCT012G145	38 years
PCT012G146	39 years
PCT012G147	40 years
PCT012G148	41 years
PCT012G149	42 years
PCT012G150	43 years
PCT012G151	44 years
PCT012G152	45 years
PCT012G153	46 years
PCT012G154	47 years
PCT012G155	48 years
PCT012G156	49 years
PCT012G157	50 years
PCT012G158	51 years
PCT012G159	52 years
PCT012G160	53 years
PCT012G161	54 years
PCT012G162	55 years
PCT012G163	56 years
PCT012G164	57 years
PCT012G165	58 years
PCT012G166	59 years
PCT012G167	60 years
PCT012G168	61 years
PCT012G169	62 years
PCT012G170	63 years
PCT012G171	64 years
PCT012G172	65 years
PCT012G173	66 years
PCT012G174	67 years
PCT012G175	68 years
PCT012G176	69 years
PCT012G177	70 years
PCT012G178	71 years
PCT012G179	72 years
PCT012G180	73 years
PCT012G181	74 years
PCT012G182	75 years
PCT012G183	76 years
PCT012G184	77 years
PCT012G185	78 years
PCT012G186	79 years
PCT012G187	80 years
PCT012G188	81 years
PCT012G189	82 years
PCT012G190	83 years
PCT012G191	84 years
PCT012G192	85 years
PCT012G193	86 years
PCT012G194	87 years
PCT012G195	88 years
PCT012G196	89 years
PCT012G197	90 years
PCT012G198	91 years
PCT012G199	92 years
PCT012G200	93 years
PCT012G201	94 years
PCT012G202	95 years
PCT012G203	96 years
PCT012G204	97 years
PCT012G205	98 years
PCT012G206	99 years
PCT012G207	100 to 104 years
PCT012G208	105 to 109 years
PCT012G209	110 years and over

Notes:

Source: 2000 SF1 PCT12G.

Relevant Documentation:

Excerpt from:	Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011.
	Summary File 1 Technical Documentation -> Appendix B. Definitions of Subject Characteristics -> Population Characteristics -> Sex

Sex

Individuals were asked to mark either "male" or "female" to indicate their sex. For most cases in which sex was not reported, the appropriate entry was determined from the persons given (i.e., first) name and household relationship. Otherwise, sex was allocated according to the relationship to the householder and the age of the person. (For more information on allocation, see "2010 Census: Operational Overview and Accuracy of the Data.")

Sex Ratio

The sex ratio represents the balance between the male and female populations. Ratios above 100 indicate a larger male population, and ratios below 100 indicate a larger female population. This measure is derived by dividing the total number of males by the total number of females and then multiplying by 100. It is rounded to the nearest tenth.

Comparability

A question on the sex of individuals has been asked of the total population in every census.

Excerpt from:	Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011.
	Summary File 1 Technical Documentation -> Appendix B. Definitions of Subject Characteristics -> Population Characteristics -> Age

Age

The data on age were derived from answers to a two-part question (i.e., age and date of birth). The age classification for a person in census tabulations is the age of the person in completed years as of April 1, 2010, the census reference date. Both age and date of birth responses are used in combination to
determine the most accurate age for the person as of the census reference date. Inconsistently reported and missing values are assigned or allocated based on the values of other variables for that person, from other people in the household or from people in other households (i.e., hot-deck imputation).
Age data are tabulated in age groupings and single years of age. Data on age also are used to classify other characteristics in census tabulations.

Median Age

This measure divides the age distribution into two equal parts: one-half of the cases falling below the median value and one-half above the value. Median age is computed on the basis of a single-year-of-age distribution using a linear interpolation method.

Limitation of the data

There is some tendency for respondents to provide their age as of the date they completed the census questionnaire or interview, not their age as of the census reference date. The two-part question and editing procedures have attempted to minimize the effect of this reporting problem on tabulations. Additionally, the current census age question displays the census reference date prominently, and interviewer training emphasizes the importance of collecting age as of the reference date.

Respondents sometimes round a persons age up if they were close to having a birthday. For most single years of age, the misstatements are largely offsetting. The problem is most pronounced at age 0. Also, there may have been more rounding up to age 1 to avoid reporting age as 0 years. (Age in completed months was not collected for infants under age 1.) Editing procedures correct this problem.

There is some respondent resistance to reporting the ages of babies in completed years (i.e., 0 years old when the baby is under 1 year old). Instead, babies ages are sometimes reported in months. The two-part question along with enhanced editing and data capture procedures correct much of this problem before the age data are finalized in tabulations. Additionally, the current census age question includes an instruction for babies ages to be answered as 0 years old when they are under 1 year old.

Age heaping is a common age misreporting error. Age heaping is the tendency for people to overreport ages (or years of birth) that end in certain digits (commonly digits 0 or 5) and underreport ages or years of birth ending in other digits. The two-part question helps minimize the effect of age heaping on the final tabulations.

Age data for centenarians have a history of data quality challenges. The counts in the 1970 and 1980 Censuses for people 100 years and over were substantially overstated. Editing and data collection methods have been enhanced in order to meet the data quality challenges for this population.

It also has been documented that the population aged 69 in the 1970 Census and the population aged 79 in the 1980 Census were overstated. The population aged 89 in 1990 and the population aged 99 in 2000 did not have an overstated count. (For more information on the design of the age question, see the Comparability section below.)

Comparability

Age data have been collected in every census. However, there have been some differences in the way they have been collected and processed over time. In the 2010 Census (as in Census 2000), each individual provided both an age and an exact date of birth. The 1990 Census collected age and year of birth. Prior censuses had collected month and quarter of birth in addition to age and year of birth. The 1990 Census change was made so that coded information could be obtained for both age and year of birth.

In each census since 1940, the age of a person was assigned when it was not reported. In censuses before 1940, with the exception of 1880, people of unknown age were shown as a separate category. Since 1960, assignment of unknown age has been performed by a general procedure described as imputation. The specific procedures for imputing age have been different in each census. (For more information on imputation, see 2010 Census: Operational Overview and Accuracy of the Data.)

Excerpt from:	Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011.
	Summary File 1 Technical Documentation -> Appendix B. Definitions of Subject Characteristics -> Population Characteristics -> Race -> Two or More Races

Two or More Races

People may choose to provide two or more races either by checking two or more race response check boxes, by providing multiple responses, or by some combination of check boxes and other responses. The race response categories shown on the questionnaire are collapsed into the five minimum race groups identified by OMB and the Census Bureaus Some Other Race category. For data product purposes, Two or More Races refers to combinations of two or more of the following race categories:
  1. White
  2. Black or African American
  3. American Indian or Alaska Native
  4. Asian
  5. Native Hawaiian or Other Pacific Islander
  6. Some Other Race
There are 57 possible combinations (see Figure B-1) involving the race categories shown above. Thus, according to this approach, a response of "e;White"e; and "Asian" was tallied as Two or More Races, while a response of Japanese and Chinese was not because Japanese and Chinese are both Asian responses.

Figure B-1. Two or More Races (57 Possible Specified Combinations)
  1. White; Black or African American
  2. White; American Indian and Alaska Native
  3. White; Asian
  4. White; Native Hawaiian and Other Pacific Islander
  5. White; Some Other Race
  6. Black or African American; American Indian and Alaska Native
  7. Black or African American; Asian
  8. Black or African American; Native Hawaiian and Other Pacific Islander
  9. Black or African American; Some Other Race
  10. American Indian and Alaska Native; Asian
  11. American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander
  12. American Indian and Alaska Native; Some Other Race
  13. Asian; Native Hawaiian and Other Pacific Islander
  14. Asian; Some Other Race
  15. Native Hawaiian and Other Pacific Islander; Some Other Race
  16. White; Black or African American; American Indian and Alaska Native
  17. White; Black or African American; Asian
  18. White; Black or African American; Native Hawaiian and Other Pacific Islander
  19. White; Black or African American; Some Other Race
  20. White; American Indian and Alaska Native; Asian
  21. White; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander
  22. White; American Indian and Alaska Native; Some Other Race
  23. White; Asian; Native Hawaiian and Other Pacific Islander
  24. White; Asian; Some Other Race
  25. White; Native Hawaiian and Other Pacific Islander; Some Other Race
  26. Black or African American; American Indian and Alaska Native; Asian
  27. Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander
  28. Black or African American; American Indian and Alaska Native; Some Other Race
  29. Black or African American; Asian; Native Hawaiian and Other Pacific Islander
  30. Black or African American; Asian; Some Other Race
  31. Black or African American; Native Hawaiian and Other Pacific Islander; Some Other Race
  32. American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander
  33. American Indian and Alaska Native; Asian; Some Other Race
  34. American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some Other Race
  35. Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  36. White; Black or African American; American Indian and Alaska Native; Asian
  37. White; Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander
  38. White; Black or African American; American Indian and Alaska Native; Some Other Race
  39. White; Black or African American; Asian; Native Hawaiian and Other Pacific Islander
  40. White; Black or African American; Asian; Some Other Race
  41. White; Black or African American; Native Hawaiian and Other Pacific Islander; Some Other Race
  42. White; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander
  43. White; American Indian and Alaska Native; Asian; Some Other Race
  44. White; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some Other Race
  45. White; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  46. Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander
  47. Black or African American; American Indian and Alaska Native; Asian; Some Other Race
  48. Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some Other Race
  49. Black or African American; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  50. American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  51. White; Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander
  52. White; Black or African American; American Indian and Alaska Native; Asian; Some Other Race
  53. White; Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some Other Race
  54. White; Black or African American; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  55. White; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  56. Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race
  57. White; Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some Other Race

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