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Table 1 Definitions of socio-demographic and socioeconomic variables and their distribution

From: Patterns of social inequalities across pregnancy and birth outcomes: a comparison of individual and neighborhood socioeconomic measures

Variables & definitions

Categories

Total sample (weighted)

  

N*

%

Socio-demographic variables

Age

Total

68705

100

Maternal age at birth of baby

<20 years

1563

2.27

20 to 24

8383

12.20

25 to 29

23120

33.65

30 to 34

23448

34.13

35 to 39

10171

14.80

40 to 50

2020

2.94

Parity

Total

68705

100

Past births and/or still-births

Yes

30209

43.97

Independent Variables: Socioeconomic Position (SEP) measures

Individual SEP measures

   

Education

Total

68705

100

Highest level of maternal education

Less than high school (HS)

4632

6.74

HS diploma

12898

18.77

More than HS (ref.)

51175

74.49

Household income (LICO)

Total

68705

100

At/below or above the low-income cutoff point (LICO) [40]

Below or at LICO

13710

19.96

Above LICO (ref)

54995

80.04

Neighborhood-level SEP measure

   

Percent of households below LICO in the neighborhood

Total

68705

100.00

Place of residence located within a census dissemination area with a composition of 15% or more households below LICO

High SEP: <= 15% of households below or at LICO (ref)

52118

75.86

Data source: Census 2006 all other variables are from the MES

Low SEP: >15% of households below LICO

16587

24.14

Combined SEP measure

   

Two-level categorical SEP variable, Individual and neighborhood

Total

68705

100

Combined variable: a four-level categorical variable combining respondents’ household income with %LICO in a neighborhood

Low Individual SEP-

6240

9.08

low neighbouhood SEP

Low Individual SEP-high neighborhood SEP

7470

10.87

High Individual SEP-low neighborhood SEP

10347

15.06

High Individual SEP-High neighborhood SEP (ref)

44648

64.98

  1. *Due to missing data, the total number for some variables does not sum up to 68705.