Table 1

Sociodemographic characteristics, presence of risk factors, and perinatal mortality, preterm birth, and small-for-gestational age over the period 2003–2014 in intervention group (targeted urban neighbourhoods in Rotterdam) and control group (other urban neighbourhoods in the Netherlands), stratified by deprivation of postal code area*

Intervention areaControl areas
All Deprived Non-deprived All Deprived Non-deprived
Total no of deliveries61 41550 72710 688881 202340 914540 288
Parity
 Nulliparous48%29 30846%23 18057%612847%418 07447%160 27048%257 804
 1–244%26 88045%22 71639%416447%417 53846%156 89248%260 646
 3+9%522710%48314%3965%45 5907%23 7524%21 838
Ethnicity (non-Dutch) 68%41 70273%36 95144%475137%321 95049%167 94329%154 007
Age of mother
 <2520%12 42322%11 31910%110413%110 46518%60 1919%50 274
 25–2930%18 36131%15 67925%268228%250 32231%105 83427%144 488
 30–3431%18 91729%14 52241%439537%327 36133%111 34940%216 012
 35–3916%961615%749120%212519%164 40316%53 25221%111 151
 ≥403%20983%17164%3823%28 6513%10 2883%18 363
Socioeconomic status
 Lowest 20% disposable household income42%25 91946%23 43123%248824%212 40535%120 48817%91 917
More than 1 risk factor†59%36 13963%29 63843%650134%299 72749%129 41827%170 309
Perinatal mortality (/1000 stillbirths and live singleton births)
 2003–20096.52236.72024.8216.231737.114365.71737
 2010–20145.11365.71163.2204.516675.27254.0942
Preterm birth rate (/1000 live singleton births)
 2003–2009632166641917572495628 4476012 0665416 381
 2010–2014601611611254573575520 3765980985312 278
SGA rate (1000 live singleton births)
 2003–200910937561133377873798442 5059619 3307623 175
 2010–2014942513982007805067628 2498611 8987016 351
  • *Deprivation is defined as the lowest quintile of postal codes by status score, an area level composite index of individual household income, education and employment status calculated every 4 years by the Netherlands Institute of Social Research.

  • †The following risk factors are considered: nulliparous, non-Dutch ethnicity, age of the mother <25 year, lowest 20% disposable household income.

  • SGA, small-for-gestational age.