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Table 3
Crude and adjusted odds ratios comparing neighbourhood income quintiles Q2, Q3, Q4 and Q5 with Q1, and recent immigrants with longer-term residents, Toronto, 1996/1997 to 2000/2001

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Neighbourhood income quintiles Preterm birth Low birthweight Full-term low birthweight
Crude odds ratio 95% confidence interval Adjusted odds ratio2 95% confidence interval Crude odds ratio 95% confidence interval Adjusted odds ratio3 95% confidence interval Crude odds ratio 95% confidence interval Adjusted odds ratio3 95% confidence interval
Q1 (highest)1 1.00 ... 1.00 ... 1.00 ... 1.00 ... 1.00 ... 1.00 ...
Q2 1.124 1.03 to 1.20 1.144 1.05 to 1.25 1.264 1.16 to 1.37 1.234 1.11 to 1.36 1.374 1.20 to 1.56 1.334 1.15 to 1.52
Q3 1.124 1.04 to 1.21 1.164 1.06 to 1.27 1.294 1.19 to 1.40 1.284 1.16 to 1.41 1.364 1.19 to 1.55 1.304 1.13 to 1.49
Q4 1.154 1.06 to 1.23 1.194 1.09 to 1.30 1.334 1.23 to 1.44 1.284 1.16 to 1.41 1.384 1.21 to 1.57 1.294 1.12 to 1.49
Q5 (lowest) 1.194 1.11 to 1.28 1.254 1.15 to 1.37 1.504 1.39 to 1.62 1.464 1.32 to 1.61 1.664 1.46 to 1.88 1.534 1.34 to 1.76
Recent immigrant
No1 1.00 ... 1.00 ... 1.00 ... 1.00 ... 1.00 ... 1.00 ...
Yes 0.894 0.84 to 0.93 0.894 0.84 to 0.95 1.064 1.01 to 1.12 1.184 1.10 to 1.26 1.304 1.20 to 1.40 1.244 1.14 to 1.35
1. reference category
2. adjusted for infant sex, maternal age group, neighbourhood income quintile, and recent immigrant status
3. also adjusted for gestational age group
4. significantly different from reference category (p < 0.05)
Data source: Discharge Abstract Database, Canadian Institute for Health Information.
Table source: Statistics Canada, 2007, "Birth outcomes by neighbourhood income and recent immigration in Toronto," Health Reports, Vol. 1, No. 4, catalogue number 82-003-XWE.