Table 2 Definitions of selected covariates

Reproductive/health care factors

Health care provider started labour

Did your healthcare provider try to start or induce your labour by the use of medication or some other technique?

Prepregnancy health problems

Before your pregnancy, did you have any medical conditions or health problems that required you to take medication for more than 2 weeks, have special care or extra tests during your pregnancy?

During pregnancy health problems

During your pregnancy, did you develop any new medical conditions or health problems that required you to take medication for more than 2 weeks, have special care or extra tests?

Antenatal care provider

From which type of healthcare provider, such as an obstetrician, family doctor or midwife, did you receive most of [your prenatal] care?

Psychosocial factors

Support

During your pregnancy, how often was support available to you when you needed it? None/a little/some/most/all of the time.

Stressful life events

High stress was defined as experiencing 3 or more of the following 12 events in the year before the birth: close family member hospitalized, move to a new address, homelessness, woman or partner lost job, woman or partner went to jail, more than usual arguments with partner, partner not wanting pregnancy, separation or divorce, bills that could not be paid, a physical fight, someone close having a problem with alcohol or drugs, someone close dying.

History of depression

Before your pregnancy, had you ever been prescribed anti-depressants or been diagnosed with depression?