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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: J Fam Issues. 2014 Apr 21;37(8):1046–1073. doi: 10.1177/0192513X14530973

Table 2b.

Descriptive Statistics of Time-Varying Covariates by Age Group Based on Person-Month Data Sets for Men (Weighted Results)

Age 18–23 Age 24–30

(1)
w/o
imputation, complete
(2)
w/
imputation, complete
(3)
w/
imputation, restricted
(1)
w/o
imputation, complete
(2)
w/
imputation, complete
(3)
w/
imputation, restricted
N. of person-months 287,966 287,966 127,415 119,522 119,522 81,697
Mean (Std. Dev.), Weighted Results
Continuous Variables
 Annual Income (ln $)a 6.19 (3.98) 6.14 (0.01) 6.89 (0.01) 8.23 (3.74) 8.14 (0.01) 8.65 (0.01)
 Occupational Status (1–7)b 2.59 (0.97) 2.72 (0.02) 2.55 (0.00) 3.12 (1.19) 3.04 (0.01) 3.08 (0.00)
 Occupational autonomy (1–5)c 3.78 (0.42) 3.83 (0.01) 3.76 (0.00) 3.92 (0.44) 3.92 (0.01) 3.91 (0.00)
Percentage Distribution (%), Weighted Results
Categorical Variables
Education
 Less than high school 16.61 18.89 19.07 9.96 10.85 9.77
 High school 67.02 74.24 73.38 56.25 60.60 60.67
 Some college 2.16 2.38 2.49 5.04 5.40 5.63
 College or more 4.14 4.50 5.06 21.83 23.16 24.93
 Missingness 10.09 6.91
School Enrollment
 Enrolled 37.87 37.90 13.17 13.17
 Not enrolled 62.00 62.10 86.80 86.83
 Missingness 0.13 0.03
Fertility History of first births
 No first births 84.34 87.93 83.29 72.54 74.32 74.21
 Pregnancies 1.76 1.84 2.56 1.44 1.49 1.63
 1st year of the child’s life 2.70 2.83 3.93 2.68 2.75 3.07
 2nd year or beyond of the child’s life 7.03 7.40 10.22 20.53 21.14 21.08
 Missingness 4.17 2.81
Employment
 Not Employed 31.79 32.01 20.95 21.14
 Part-time 27.39 27.55 26.18 17.84 17.98 19.24
 Full-Time 40.22 40.45 73.82 60.46 60.89 80.76
 Missingness 0.60 0.76

Note: Data are weighted. Standard deviations are shown in parentheses for continuous variables.

a

For men, 23.02% of earnings data are missing between ages 18 and 23 and 22.74% are missing between ages 24 and 30.

b

For men, between ages 18 and 23, 2.20% of data are missing invalidly on occupational status and 2.64% of data are missing between ages 24 and 30.

c

For men, between ages 18 and 23, 2.37% of data are missing invalidly on occupational autonomy and 3.08% of data are missing between ages 24 and 30.