Comparability — Belgium [top]

For 1966 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — Bulgaria [top]

For 1965 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — Canada [top]

In 2005 and 2010, AGE is not an exact measure of a diarist's age. The original variable data indicates the respondent's age in 15 categories, and is recoded in the following way:

AGEGR5 - AGE (recoded)
15 to 17 - 16
18 to 19 - 18
20 to 24 - 22
25 to 29 - 27
30 to 34 - 32
35 to 39 - 37
40 to 44 - 42
45 to 49 - 47
50 to 54 - 52
55 to 59 - 57
60 to 64 - 62
65 to 69 - 67
70 to 74 - 72
75 to 79 - 77
80 years and over - 80

In 2015, the original variable age captures the respondent's age in 7 interval categories and is recoded at the middle point.

Comparability — Czech Republic [top]

For 1965 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — Finland [top]

For 1979, the original variable captures the respondent’s age in 11 interval categories.
For confidentiality purposes in 2009, the variable AGE has been coded into 5 year categories in the following way:

Code : Age range
12 : 10-14
17 : 15-19
22 : 20-24
27 : 25-29
32 : 30-34
37 : 35-39
42 : 40-44
47 : 45-49
52 : 50-54
57 : 55-59
62 : 60-64 (top code for 1979)
67 : 65-69
72 : 70-74
77 : 75-79
82 : 80-84
87 : 85-89
90 : 90 and older (top code for 2008)

Comparability — France [top]

For 1966 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — Germany [top]

For 1965 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — Netherlands [top]

For 2000 and 2005, age at the time of the survey is not available though year and month of birth are available. AGE is the difference between the survey year and birth year.

Comparability — Peru [top]

For 1966 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — Serbia [top]

For 1965 the original variable captures the respondent’s age in 9 categories.
Code: Age range
18 : 18-20
22 : 20-24
27: 25-29
35: 30-39
45: 40-49
52: 50-54
57: 55-59
62: 60-64
72: 65+

Comparability — United States [top]

For 1998-2001, the 1999-2001 NSP survey did not initially ask the respondent's age. The survey team did, however, try to recontact participants to ask for their ages; 387 individuals could not be located or did not reply.