Table 1.
Maternal characteristics in the second pregnancy by small-for-gestational-age birthweight status at the first pregnancy, Consecutive Pregnancy Study, 2002–2010, n=25,241.
| Second Pregnancy Characteristics | First Pregnancy
|
P | |
|---|---|---|---|
| Non-SGA (n=22,848) n (%) |
SGA (n=2,393) n (%) |
||
| SGAa | <.001 | ||
| No | 21,781 (95.3) | 1,909 (79.8) | |
| Yes | 1,067 (4.7) | 484 (20.2) | |
| Age, years | <.001 | ||
| 14–19 | 728 (3.2) | 117 (4.8) | |
| 20–24 | 7246 (31.7) | 803 (33.6) | |
| 25–29 | 10693 (46.8) | 1014 (42.4) | |
| 30–34 | 3286 (14.4) | 337 (14.1 | |
| 35–49 | 895 (3.9) | 122 (5.1) | |
| Race-ethnicity | <.001 | ||
| Non-Hispanic white | 20351 (89.1) | 2027 (84.7) | |
| Non-Hispanic black | 83 (0.4) | 23 (1.0) | |
| Hispanic | 1851 (8.1) | 252 (10.5) | |
| Asian/Pacific Islander | 468 (2.1) | 74 (3.1) | |
| Other | 95 (0.4) | 17 (0.7) | |
| Marital status | <.001 | ||
| Married | 20617 (90.2) | 2047 (85.5) | |
| Non-married | 2231 (9.8) | 346 (14.5) | |
| Insurance | |||
| Private | 16959 (74.2) | 1650 (69.0) | <.001 |
| Public | 5889 (25.8) | 743 (31.1) | |
| Smoking during pregnancy | <.001 | ||
| No | 22284 (97.5) | 2259 (94.4) | |
| Yes | 564 (2.5) | 134 (5.6) | |
| Alcohol during pregnancy | .004 | ||
| No | 22506 (98.5) | 2339 (97.7) | |
| Yes | 342 (1.5) | 54 (2.3) | |
| Short stature | <.001 | ||
| No | 18778 (82.2) | 1705 (71.3) | |
| Yes | 4070 (17.8) | 688 (28.8) | |
| Prepregnancy weight status | <.001 | ||
| Underweight | 1148 (5.0) | 201 (8.4) | |
| Normal weight | 13172 (57.7) | 1380 (57.7) | |
| Overweight | 5056 (22.1) | 484 (20.2) | |
| Obese | 3472 (15.2) | 328 (13.7) | |
| Gestational weight gain adequacy | <.001 | ||
| Inadequate | 5097 (22.3) | 788 (32.9) | |
| Within | 6318 (27.7) | 686 (28.7) | |
| Excessive | 11433 (50.0) | 919 (38.4) | |
| Diabetes | .07 | ||
| None | 21783 (95.3) | 2298 (96.0) | |
| Gestational | 694 (3.0) | 53 (2.2) | |
| Prepregnancy | 371 (1.6) | 42 (1.8) | |
| Hypertension | .03 | ||
| Normotensive | 21600 (94.5) | 2228 (93.1) | |
| Gestational hypertension | 497 (2.2) | 72 (3.0) | |
| Preeclampsia | 413 (1.8) | 53 (2.2) | |
| Chronic hypertension | 282 (1.2) | 36 (1.5) | |
| Superimposed preeclampsia | 56 (0.3) | 4 (0.2) | |
| Asthma | .08 | ||
| No | 20958 (91.7) | 2170 (90.7) | |
| Yes | 1890 (8.3) | 223 (9.3) | |
| Thyroid disease | .34 | ||
| No | 21657 (94.8) | 2279 (95.2) | |
| Yes | 1191 (5.2) | 114 (4.8) | |
| Depression or other mental health condition | .05 | ||
| No | 20342 (89.0) | 2099 (87.7) | |
| Yes | 2506 (11.0) | 294 (12.3) | |
| Interpregnancy interval, months | <.001 | ||
| <12 | 5948 (26.0) | 742 (31.0) | |
| 12–<18 | 6263 (27.4) | 576 (24.1) | |
| 18–23 | 4803 (21.0) | 470 (19.6) | |
| >23 | 5834 (25.5) | 605 (25.3) | |
SGA, small-for-gestational-age.
a
SGA defined using the 10th percentile of a population-based reference.