Reliability results
| Question | Kappa | Percentage agreement | Nature of discrepant answers |
| In which of the following languages do you prefer to read or write? | 1.00 | 7/7 | None |
| Marital status | 0.70 | 6/7 | Widow versus divorced |
| What is your highest level of schooling/education? | 0.46 | 6/7 | Below grade 7/standard 5 versus don’t know |
| What is your employment status? | 0.61 | 6/7 | Unemployed versus employed |
| Monthly income | 0.15 | 3/7 | Between R4000 and R10 000 versus refused; disability grant versus <R4000; <R4000 versus between R4000 and R10 000 |
| How many times have you been pregnant? | 1 | 7/7 | None |
| How many children do you have? | 1 | 7/7 | None |
| Did you ever have a miscarriage? | 1 | 7/7 | None |
| Did you ever lose a baby at birth? | 1 | 7/7 | None |
| Did you ever lose a child later on? | 1 | 7/7 | None |
| Did you ever have a termination of pregnancy? | 0 | 6/7 | Yes versus no |
| How many months pregnant were you when you went to book at clinic with your youngest child? | 0.45 | 3/7 | 4 months versus <2 months; 5 months versus 4 months; did not book versus 6 months |
| Which clinic did you attend when you were pregnant with the youngest child? | 0.82 | 6/7 | Did not attend versus Eastern Cape |
| Did you attend a hospital when you were pregnant with the youngest child? | 1 | 7/7 | None |
| If you attended hospital, what was its name? | 0.81 | 6/7 | Tygerberg versus Eastern Cape |
| How many times did you attend clinic when you were pregnant with your youngest child? | 0.70 | 6/7 | Did not attend versus once |
| In which province was your youngest child born? | 1 | 7/7 | None |
| In which type of healthcare facility did you deliver the youngest child? | 0.59 | 6/7 | Hospital versus Midwife Obstetric Unit |
| What was name of the hospital or clinic? | 0.81 | 6/7 | Gugulethu, KTC versus Tygerberg |