Table 1.
Comparison of demographic and maternal characteristics (prepregnancy) between the late-preterm and full-term groups
| Characteristic | Total sample (n = 1,227) n (%) |
LPs (n = 77) n (%)a |
Terms (n = 1,150) n (%)a |
P value |
|---|---|---|---|---|
| Maternal age | ||||
| <25 years | 75 (6.3) | 8 (11.0) | 67 (6.0) | 0.24 |
| 25–34 years | 871 (73.3) | 51 (69.9) | 820 (73.5) | |
| 35+ years | 243 (20.4) | 14 (19.2) | 229 (20.5) | |
| Education | ||||
| High school or less | 123 (10.1) | 7 (9.3) | 116 (10.1) | 0.72 |
| College, trade, university | 893 (73.3) | 53 (70.7) | 840 (73.4) | |
| Grad school | 203 (16.7) | 15 (20.0) | 188 (16.4) | |
| Household income | ||||
| <60,000 | 207 (17.5) | 20 (27.4) | 187 (16.9) | 0.02 |
| 60,000+ | 974 (82.5) | 53 (72.6) | 921 (83.1) | |
| Marital status | ||||
| Married/common-law | 1,156 (94.9) | 73 (97.3) | 1,083 (94.8) | 0.58 |
| Other | 62 (5.1) | 2 (2.7) | 60 (5.2) | |
| Ethnic origin | ||||
| White/Caucasian | 937 (76.9) | 47 (62.7) | 890 (77.8) | 0.003 |
| Other | 282 (23.1) | 28 (37.3) | 254 (22.2) | |
| Born in Canada | ||||
| Yes | 942 (77.2) | 53 (70.7) | 889 (77.6) | 0.16 |
| No | 278 (22.8) | 22 (29.3) | 256 (22.4) | |
| History of depression | ||||
| No | 841 (68.9) | 56 (74.7) | 785 (68.7) | 0.27 |
| Yes | 379 (31.1) | 19 (25.3) | 360 (31.4) | |
| History of other mental health problems | ||||
| No | 1,128 (91.9) | 69 (92.0) | 1,059 (92.7) | 0.84 |
| Yes | 90 (7.4) | 6 (8.0) | 84 (7.3) | |
| History of abuse | ||||
| No | 851 (71.7) | 47 (67.1) | 804 (72.0) | 0.38 |
| Yes | 336 (28.3) | 23 (32.9) | 313 (28.0) | |
| Parity | ||||
| 0 | 626 (51.6) | 43 (57.3) | 583 (51.2) | 0.30 |
| 1+ | 588 (48.4) | 32 (42.7) | 556 (48.8) | |
| Previous preterm birth | ||||
| No | 1,155 (94.7) | 66 (88.0) | 1,089 (95.2) | 0.01 |
| Yes | 64 (15.3) | 9 (12.0) | 55 (9.1) | |
| Previous lbw birth | ||||
| No | 1,183 (97.0) | 29 (85.3) | 578 (94.9) | 0.07 |
| Yes | 36 (3.0) | 5 (14.7) | 31 (5.1) | |
| Used active method to get pregnant | ||||
| No | 1,151 (94.4) | 74 (98.7) | 1,077 (94.1) | 0.12 |
| Yes | 68 (5.6) | 1 (1.3) | 67 (5.9) |
lbw low birth weight
aDenominator varies due to missing values for some variables