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Table 1 Maternal demographic characteristics for the cohort (n = 1111) and comparison group (n = 23,414)

From: Maternal health, pregnancy and birth outcomes for women involved in care proceedings in Wales: a linked data study

Variable Level Cohort n (%) Comparison n (%) p-value
Deprivation at childbirth Quintile 1: Most Deprived 549 (49.4) 11,641 (49.7) 0.998
Quintile 2 293 (26.4) 6186 (26.4)  
Quintile 3 158 (14.2) 3317 (14.2)  
Quintile 4 80 (7.2) 1633 (7.0)  
Quintile 5: Least Deprived 31 (2.8) 637 (2.7)  
Age at current birth < 21 years 276 (24.8) 5,830 (24.9) 1.0
21 to 25 years 297 (26.7) 6281 (26.8)  
26 to 30 years 259 (23.3) 5475 (23.4)  
31 to 35 years 172 (15.5) 3601 (15.4)  
> 35 years 107 (9.6) 2227 (9.5)  
Age at current birth (mean (SD))a   26.0 (6.5) 26.1 (6.2) 0.482
Age at entry to motherhood < 21 years 699 (63.5) 9847 (42.7) < 0.001
21 to 25 years 245 (22.3) 6520 (28.3)  
26 to 30 years 82 (7.5) 3895 (16.9)  
31 to 35 years 44 (4.0) 1935 (8.4)  
> 35 years 30 (2.7) 849 (3.7)  
Missing 11 368  
Age at entry to motherhood (mean (SD))a   20.9 (5.0) 23.2 (5.6) < 0.001
  1. Missing data: Age at entry to motherhood (cohort: 11; comparison 368)
  2. a One-way analysis of variance tests were computed to compare differences in means between the cohort and matched comparison groups for continuous variables. Chi-squared analyses were used to compare all other differences for categorical variables in this table