Table 1 Characteristics of all liveborn singleton infants and their mothers, born in an Ontario hospital between April 1, 2002 and March 31, 2013. Shown are births in the MOMBABY dataset vs. those concomitantly available in the EMRALD™ database
From: Infant feeding practices within a large electronic medical record database
Characteristic | MOMBABY dataset (N = 1,204,042) | EMRALD™ dataset (N = 8,815) | Standardized difference |
|---|---|---|---|
Mean (SD) age, years | 29.9 (5.5) | 30.2 (5.3) | −0.1 |
Median (IQR) parity | 1 (1) | 1 (1) | 0.0 |
Rural residence, n (%) | 125,850 (10.5) | 2151 (24.4) | −0.4 |
Mother’s World region of birth, n (%) | |||
Canada | 901,188 (74.9) | 7719 (87.6) | −0.3 |
Europe/Western | 47,586 (4.0) | 358 (4.1) | 0.0 |
African/Caribbean | 38,508 (3.2) | 132 (1.5) | 0.1 |
Middle East/N Africa | 30,679 (2.6) | 120 (1.4) | 0.1 |
Latin America | 23,076 (1.9) | 121 (1.4) | 0.0 |
South Asia | 94,458 (7.9) | 133 (1.5) | 0.3 |
East Asia | 68,467 (5.7) | 227 (2.6) | 0.2 |
Unknown | 80 (< 0.1) | ≤ 5 (< 0.1) | 0.0 |
Income quintile (Q), n (%) | |||
Q1 | 265,136 (22.0) | 1540 (17.5) | 0.1 |
Q2 | 240,322 (20.0) | 1660 (18.8) | 0.0 |
Q3 | 244,706 (20.3) | 1922 (21.8) | 0.0 |
Q4 | 249,328 (20.7) | 1900 (21.6) | 0.0 |
Q5 | 199,110 (16.5) | 1756 (19.9) | −0.1 |
Unknown | 5440 (0.5) | 37 (0.4) | 0.0 |
Mean (SD) birthweight, g | 3461 (472) | 3490 (464) | −0.1 |
Mean (SD) gestational age, weeks | 39.2 (1.1) | 39.3 (1.1) | −0.1 |
Infant male sex, n (%) | 610,661 (50.7) | 4527 (51.4) | 0.0 |