Table 2.
Multilevel associations between low birth weight in singleton births, mother’s socioeconomic position and neighborhood socioeconomic level in Barcelona, Spain, 2000–2005
| Model 0 | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | |
|---|---|---|---|---|---|---|
| aOR (IC 95%) | aOR (IC 95%) | aOR (IC 95%) | aOR (IC 95%) | aOR (IC 95%) | ||
| Maternal age | ||||||
| 12–19 years | 1.50 (1.23–1.81) | 1.47 (1.21–1.77) | 1.47 (1.22–1.78) | 1.48 (1.23–1.78) | 1.49 (1.23–0.81) | |
| 20–24 years | 1.28 (1.14–1.43) | 1.26 (1.12–1.43) | 1.26 (1.12–1.41) | 1.27 (1.14–1.42) | 1.27 (1.13–1.43) | |
| 25–34 years | 1 | 1 | 1 | 1 | 1 | |
| 35–49 years | 1.23 (1.15–1.30) | 1.23 (1.16–1.31) | 1.24 (1.16–1.32) | 1.23 (1.15–1.30) | 1.23 (1.16–1.31) | |
| Country of origin | ||||||
| Spain | 1 | 1 | 1 | 1 | 1 | |
| Developed countries | 0.80 (0.64–1.00) | 0.81 (0.65–1.01) | 0.82 (0.65–1.02) | 0.79 (0.63–1.00) | 0.81 (0.65–1.01) | |
| Eastern Europe | 0.89 (0.63–1.27) | 0.89 (0.63–1.27) | 0.90 (0.63–1.28) | 0.88 (0.62–1.26) | 0.90 (0.64–1.27) | |
| Maghrib Countries | 0.57 (0.43–0.76) | 0.56 (0.42–0.74) | 0.57 (0.43–0.75) | 0.55 (0.41–0.73) | 0.57 (0.43–0.76) | |
| Africa | 0.78 (0.39–1.56) | 0.77 (0.38–1.55) | 0.77 (0.38–1.54) | 0.77 (0.38–1.55) | 0.77 (0.39–1.55) | |
| Central and South America | 0.87 (0.77–0.99) | 0.87 (0.77–0.98) | 0.88 (0.78–0.99) | 0.86 (0.77–0.98) | 0.88 (0.78–0.99) | |
| Asia | 1.18 (0.94–1.48) | 1.17 (0.94–1.46) | 1.22 (0.97–1.54) | 1.15 (0.92–1.43) | 1.20 (0.95–1.51) | |
| Sex of the newborn | ||||||
| Male | 1 | 1 | 1 | 1 | 1 | |
| Female | 1.28 (1.21–1.35) | 1.27 (1.20–1.35) | 1.28 (1.20–1.36) | 1.28 (1.21–1.35) | 1.28 (1.21–1.35) | |
| Primiparous | ||||||
| No | 1 | 1 | 1 | 1 | 1 | |
| Yes | 1.26 (1.17–1.35) | 1.25 (1.17–1.34) | 1.26 (1.18–1.34) | 1.25 (1.17–1.35) | 1.26 (1.17–1.35) | |
| Unemployment rate (2001) | ||||||
| Q1 (less) | 1 | |||||
| Q2 | 1.27 (1.14–1.41) | |||||
| Q3 | 1.19 (1.09–1.32) | |||||
| Q4 | 1.40 (1.21–1.62) | |||||
| Q5 (more) | 1.56 (1.37–1.78) | |||||
| Illiteracy rate (2004) | ||||||
| Q1 (less) | 1 | |||||
| Q2 | 1.22 (1.09–1.37) | |||||
| Q3 | 1.19 (1.06–1.33) | |||||
| Q4 | 1.36 (1.19–1.54) | |||||
| Q5 (more) | 1.56 (1.39–1.74) | |||||
| % Foreigners (2004) | ||||||
| Q1 (less) | 1 | |||||
| Q2 | 1.11 (0.94–1.32) | |||||
| Q3 | 1.26 (1.04–1.53) | |||||
| Q4 | 1.14 (0.96–1.36) | |||||
| Q5 (more) | 1.46 (1.23–1.74) | |||||
| Change in % foreigners (2000–2005) | ||||||
| Q1 (less) | 1 | |||||
| Q2 | 1.05 (0.84–1.31) | |||||
| Q3 | 0.97 (0.78–1.22) | |||||
| Q4 | 1.10 (0.87–1.38) | |||||
| Q5 (more) | 1.24 (0.97–1.59) | |||||
| tj (p value) | 0.02200 (<0.001) | 0.02038 (<0.001) | 0.00362 (0.195) | 0.00431 (0.116) | 0.01071 (0.001) | 0.01699 (<0.001) |
| Reduction tj in relation to model 0 | 7.36% | 83.55% | 80.41% | 51.32% | 22.77% |
tj = variance, aOR = adjusted OR