Table 2. Distribution of Select Demographic Factors by Single*

-Frame versus Dual†-Frame, NIS-Child, 2016-2017§

Variable 2016 2017

Dual Single Dual Single

Child's age

 19 to 23 months 30.3 (28.8-31.8) 30.3 (28.6-32.0) 30.0 (28.5-31.5) 30.0 (28.4-31.6)

 24 to 29 months 33.9 (32.3-35.5) 33.9 (32.1-35.7) 33.9 (32.4-35.4) 33.9 (32.2-35.6)

 30 to 35 months 35.8 (34.3-37.3) 35.8 (34.1-37.5) 36.1 (34.6 -37.6) 36.1 (34.5-37.7)

Child's sex

 Male 51.2 (49.6-52.8) 51.2 (49.4- 53.0) 51.2 (49.6-52.8) 51.2 (49.5-53.0)

 Female 48.8 (47.2-50.4) 48.8 (47.0-50.6) 48.8 (47.2-50.4) 48.8 (47.1-50.5)

Child's Race/Ethnicity

 Non-Hispanic, White 46.4 (44.8- 48.0) 45.8 (44.1-47.5) 47.0 (45.5-48.6) 46.5 (44.8-48.2)

 Non-Hispanic, Black 13.1 (12.0-14.2) 12.9 (11.8-14.0) 12.8 (11.6-14.0) 12.9 (11.6-14.2) 

 Hispanic 26.6 (24.9-28.3) 26.6 (24.7-28.5) 26.8 (25.2-28.4) 26.8 (25.1-28.5)

 Non-Hispanic, Other 14.0 (12.9-15.1) 14.6 (13.3-16.0) 13.4 (12.3-14.5) 13.8 (12.5-15.1) 

Household Poverty 

Status 
 At or Above Poverty 64.4 (62.8-66.0) 65.4 (63.6-67.2) 64.2 (62.6-65.8) 64.5 (62.7-66.3) 

 Below Poverty 29.2 (27.7-30.7) 28.4 (26.7-30.1) 28.7 (27.1-30.3) 28.4 (26.7-30.1) 

MSA Status

 MSA, Principal City 46.0 (44.4-47.6) 46.1 (44.3-47.9) 45.8 (44.2-47.4) 46.1 (44.4-47.8)

 MSA, Non-Principal 

City 41.6 (40.0-43.2) 42.7 (40.9-44.5) 42.2 (40.6-43.8) 42.8 (41.1-44.5)

 Non-MSA 12.4 (11.6-13.2) ¶ 11.2(10.4-12.0) ¶ 12.0 (11.2-12.8) ¶ 11.1 (10.4-11.8) ¶

Insurance Status

 Private Only 41.5 (39.9 -43.1) 42.7 (40.9 -44.5) 42.3 (40.7- 43.9) 42.6 (40.9-44.3) 

 Any Medicaid 47.5 (45.9-49.2) 46.6 (44.8-48.5) 47.8 (46.2-49.5) 47.4 (45.6-49.2) 

 Other 7.9 (6.9 -8.9) 7.7 (6.8-8.7) 7.1 (6.4-7.8) 7.3 (6.-8.1)

 Uninsured 3.0 (2.5-3.6) 2.9 (2.3-3.5) 2.7 (2.3-3.1) 2.7 (2.3-3.1)

Mother's Race/Ethnicity

 Non-Hispanic, White 51.7 (50.1-53.3) 51.3 (49.5-53.1) 52.6 (51.0-54.2) 51.9 (50.2-53.6)

 Non-Hispanic, Black 13.5 (12.4-14.6) 13.4 (12.3-14.5) 13.2 (12.0-14.4) 13.4 (12.1-14.7)
 Hispanic 23.3 (21.6-25.0) 23.3 (21.4-25.2) 23.6 (22.0-25.2) 23.6 (21.9-25.3)

 Non-Hispanic, Other 11.5 (10.4-12.6) 11.9 (10.6 - 13.2) 10.7 (9.7-11.7) 11.1 (9.9-12.3) 

Mother's Education

 Less than 12 years 15.1 (13.8-16.4) 14.9 (13.4-16.4) 16.0 (14.6-17.4) 15.8 (14.4-17.2)

 12 years 25.5 (23.9-27.1) 25.7 (23.9-275) 23.8 (22.3-25.23) 24.1 (22.5-25.7)

 More than 12 years, 

Non-College Graduate 23.0 (21.7-24.3) 22.3 (20.8-23.8) 22.4 (21.1-23.7) 22.0 (20.6-23.4)

 College Graduate 36.4 (35.0-37.90) 37.1 (35.4-38.8) 37.7 (36.2-39.2) 38.1 (36.5-39.7)

Mother's Age

 Less than equal 19 

years

0.1 (0-0.2) 0.1 (0, 0.2) 1.6 (0.8-2.4) 1.6 (0.8-2.5) 

 20 to 29 years 37.7 (36.1-39.3) 38.4 (36.6-40.2) 36.7 (35.1-38.3) 36.4 (34.8-38.0)

 30 years or older 62.1 (60.5-63.7) 61.5 (59.7-63.3) 61.6 (60.0-63.2) 61.9 (60.2-63.6)

Abbreviations: CI=confidence interval, MSA = Metropolitan Statistical Area

* Single-frame is defined as households with only cellphones. † Dual-frame is defined as households with both landlines and cell-phones.

§ Data for the 2016 survey year include children born during January 2013–May 2015 and for 2017 include children born during January 2014–May 2016. ¶ Statistically significantly difference in prevalence of factor between dual- and single-frame samples at p<0.05.