Table 12.
Variable names and their meanings
| Variable name | Variable meaning |
|---|---|
| PreGestDM | Pre-gestational diabetes |
| V1AD12b | Previous surgeries - Cervical surgery - LEEP |
| S02C01 | Assisted reproduction for this pregnancy |
| AgeCat_V1 | Age category |
| Crace_1 | Non-Hispanic White |
| Crace_2 | Non-Hispanic Black |
| Crace_3 | Hispanic |
| Crace_4 | Asian |
| Crace_5 | Other |
| V1AD12e | Previous surgeries - Abdominal surgery excluding uterine surgery |
| V1AD12c | Previous surgeries - Cervical surgery - Cryotherapy |
| V1AD12a | Previous surgeries - Cervical surgery - Cone |
| V2AE06e | Have any of your biological mother, sisters, half-sisters, or female first cousins ever had pregnancy complications - Preeclampsia, eclampsia, toxemia or pregnancy induced hypertension |
| Education | Education |
| V2AE06d | Have any of your biological mother, sisters, half-sisters, or female first cousins ever had pregnancy complications - Early or preterm rupture of the membranes |
| Height | Height |
| BMI | BMI Category |
| V1AG05 | Did you smoke any tobacco products in the three months prior to this pregnancy? |
| PctFedPoverty | Income as a percentage of 2013 federal poverty level |
| Age_at_V1 | Age |
| poverty | Poverty category |
| VITAMINDAMOUNT | How often do you take Vitamin D, alone, w/ calcium? |
| V1AF04 | What is your current marital status? |
| V1AE01 | Including this pregnancy, how many times have you been pregnant - Number of pregnancies |
| VITD_MCG | Vitamin D, mcg |
| SUP_VITD | Vitamin D from supplements |
| VXXB01aa_V1a | Medical conditions or diagnoses, High blood pressure (hypertension) - Condition noted, Visit 1 |
| VXXB01ae_V1a | Medical conditions or diagnoses, Diabetes (excluding gestational diabetes in a prior pregnancy) - Condition noted, Visit 1 |
| V1AG07 | (At Visit 1) Did you smoke any tobacco products in the last month? |
| V1AD08 | (At Visit 1) Since you became pregnant, have you had vaginal bleeding more than spotting? |
| BMI_Cat | BMI Category |
| V1AG10 | (At Visit 1) In the last month, did you use smokeless tobacco (chew or snuff)? |
| STRESSTABSAMOUNT | How often do you take Stress-Tabs, B-complex? |
| V1AD08a | (At Visit 1) Since you became pregnant, have you had vaginal bleeding more than spotting? |
| V1AG06 | (At Visit 1) In the three months prior to this pregnancy did you use smokeless tobacco (chew or snuff)? |
| V1AG04 | (At Visit 1) Have you ever used any tobacco products including cigarettes and smokeless tobacco? |
| V1AH03 | (At Visit 1) In the last month, how often have you felt nervous and ’stressed’? |
| V2AH05 | (At Visit 2) In the last month, did you use smokeless tobacco (chew or snuff)? |
| VXXB01ae_V2a | Medical conditions or diagnoses, Diabetes (excluding gestational diabetes in a prior pregnancy) - Condition noted, Visit 2 |
| V2AH02 | (At Visit 2) Did you smoke any tobacco products in the last month? |
| U2BB02 | (At Visit 2) Cervical length - mm |
| V2AD03 | (At Visit 2) Since last study visit, have you had vaginal bleeding more than spotting? |
| BMI_V2 | (At Visit 2) BMI |
| V2IA07 | (At Visit 2) Coping with stress strengthens |
| V2AE09 | Have your father, mother, brother, sister, half-brother or half-sister ever been diagnosed with hypertension (high blood pressure)? |
| VXXB01aa_V2a | Medical conditions or diagnoses, High blood pressure (hypertension) - Condition noted, Visit 2 |
| V2BA01_KG | (At Visit 2) Weight |
| V2AE06c | Have any of your biological mother, sisters, half-sisters, or female first cousins ever had pregnancy complications - Spontaneous preterm delivery (<37 weeks) |
| U2CD07 | (At Visit 2) Right uterine artery - Pulsatility Index (PI) |
| V3AD03 | (At Visit 3) Since last study visit, have you had vaginal bleeding more than spotting? |
| U3BB02 | (At Visit 3) Cervical length - mm |
| VXXB01aa_V3a | Medical conditions or diagnoses, High blood pressure (hypertension) - Condition noted, Visit 3 |
| BMI_V3 | (At Visit 3) BMI |
| U3CD07 | (At Visit 3) Right uterine artery - Pulsatility Index (PI) |
| V3AF05 | (At Visit 3) In the last month, did you use smokeless tobacco (chew or snuff)? |
| U3CC07 | (At Visit 3) Left uterine artery - Pulsatility Index (PI) |
| VXXB01ae_V3a | Medical conditions or diagnoses, Diabetes (excluding gestational diabetes in a prior pregnancy) - Condition noted, Visit 3 |
| V3AG10 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you felt difficulties were piling up so high that you could not overcome them? |
| V3AF02 | (At Visit 3) Did you smoke any tobacco products in the last month? |
| V3AG05 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you felt that things were going your way? |
| V3AG06 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you found that you could not cope with all the things that you had to do? |
| V3AD03a | (At Visit 3) How many days has vaginal bleeding more than spotting happened? - Days |
| V3AG07 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you been able to control irritations in your life? |
| V3AG09 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you been angered because of things that were outside of your control? |
| V3AG08 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you felt that you were on top of things? |
| V3AG01 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you been upset because of something that happened unexpectedly? |
| U3Dtestcheck | (At Visit 3) Whether uterine artery measurement is done |
| V3AG04 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you felt confident about your ability to handle your personal problems? |
| V3AG02 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you felt that you were unable to control the important things in your life? |
| V3AG03 | (At Visit 3) Perceived Stress Scale - In the last month, how often have you felt nervous and ’stressed’? |
| V2AD03a | (At Visit 3) How many days has vaginal bleeding more than spotting happened? - Days |
| U2CC07 | (At Visit 2) Left uterine artery - Pulsatility Index (PI) |
| V3BA01_KG | (At Visit 3) Weight |