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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.