Table 1

Descriptive data by delivery year (5 years increments, after 1999)

n (%) or median (IQR)Delivery year
1993–1998*1999–20032004–20082009–20132014–2018
Pregnancies10 4078345951811 48311 602
 First time pregnancies8651 (83.1)5368 (64.3)6104 (64.1)8039 (70)7846 (67.6)
Fertility rate2.9 (2.9–3.2)2.8 (2.5–2.9)2.7 (2.6–2.8)2.5 (2.4–2.5)2.0 (1.9–2.2)
Median age25.1 (20–31.5)24.9 (19.8–31.2)24.6 (19.8–30.6)24.9 (20.4–30.7)25.8 (21.2–31.3)
Missing47 (0.5)0 (0)2 (0)1 (0)6 (0.1)
Median antenatal visits4 (2–6)4 (3–5)4 (2–5)4 (2–5)6 (5–7)
 0–31206 (11.6)2967 (35.6)3732 (39.2)4181 (36.4)1369 (11.8)
 4–71825 (17.5)4883 (58.5)5379 (56.5)6710 (58.4)6728 (58)
 8+217 (2.1)484 (5.8)364 (3.8)535 (4.7)2298 (19.8)
 Missing7159 (68.8)11 (0.1)43 (0.5)57 (0.5)1207 (10.4)
Median years of education10 (10–11)11 (10–11)11 (10–11)11 (10–12)11 (11–12)
 No school669 (6.4)1124 (13.5)622 (6.5)423 (3.7)350 (3)
 Primary education (1–7 years)57 (0.5)119 (1.4)104 (1.1)93 (0.8)82 (0.7)
 Secondary education (8–12 years)2158 (20.7)6488 (77.7)8045 (84.5)9997 (87.1)10 223 (88.1)
 Tertiary education (>12 Years)156 (1.5)495 (5.9)421 (4.4)574 (5)672 (5.8)
 Missing7367 (70.8)119 (1.4)326 (3.4)396 (3.4)275 (2.4)
Current student2660 (25.6)1958 (23.5)2475 (26)2618 (22.8)2064 (17.8)
 Have/intend to return to school2047 (19.7)1461 (17.5)1965 (20.6)2208 (19.2)1791 (15.4)
 Unintended pregnancy3959 (38)4011 (48.1)4453 (46.8)4961 (43.2)5177 (44.6)
 Modern contraceptive use prior to pregnancy2008 (19.3)3142 (37.7)3393 (35.6)3414 (29.7)2720 (23.4)
 None7419 (71.3)4507 (54)4196 (44.1)5258 (45.8)7220 (62.2)
 Injectables1282 (12.3)2304 (27.6)2684 (28.2)2415 (21)1631 (14.1)
 Pills712 (6.8)796 (9.5)607 (6.4)640 (5.6)579 (5)
 Condoms6 (0.1)13 (0.2)90 (0.9)328 (2.9)487 (4.2)
 Other41 (0.4)69 (0.8)43 (0.5)38 (0.3)47 (0.4)
 Missing947 (9.1)656 (7.9)1898 (19.9)2804 (24.4)1638 (14.1)
Using/intending to use modern postpartum contraception3817 (36.7)3286 (39.4)3934 (41.3)5987 (52.1)7600 (65.5)
 None5339 (51.3)4304 (51.6)3564 (37.4)2532 (22)2180 (18.8)
 Injectables2863 (27.5)2889 (34.6)3445 (36.2)5117 (44.6)6520 (56.2)
 Pills618 (5.9)324 (3.9)338 (3.6)401 (3.5)627 (5.4)
 Condoms10 (0.1)17 (0.2)82 (0.9)376 (3.3)384 (3.3)
 Emergency contraception267 (2.6)0 (0)0 (0)0 (0)0 (0)
 Sterilisation47 (0.5)46 (0.6)42 (0.4)33 (0.3)26 (0.2)
 Other43 (0.4)28 (0.3)43 (0.5)61 (0.5)86 (0.7)
 Missing1220 (11.7)737 (8.8)2004 (21.1)2963 (25.8)1779 (15.3)
Delivery location
 Hospital6596 (63.4)5702 (68.3)7226 (75.9)9527 (83)10 132 (87.3)
 Clinic632 (6.1)486 (5.8)605 (6.4)493 (4.3)377 (3.2)
 Health centre198 (1.9)503 (6)561 (5.9)653 (5.7)612 (5.3)
 Home2799 (26.9)1492 (17.9)910 (9.6)548 (4.8)298 (2.6)
 Other105 (1)111 (1.3)147 (1.5)145 (1.3)98 (0.8)
 Missing77 (0.7)51 (0.6)69 (0.7)117 (1)85 (0.7)
Birth attendant
 Doctor813 (7.8)838 (10)923 (9.7)1231 (10.7)1176 (10.1)
 Nurse5406 (51.9)5802 (69.5)7331 (77)9143 (79.6)9920 (85.5)
 Family member1966 (18.9)1018 (12.2)682 (7.2)397 (3.5)190 (1.6)
 Community member330 (3.2)212 (2.5)86 (0.9)78 (0.7)43 (0.4)
 Nobody332 (3.2)271 (3.2)172 (1.8)106 (0.9)70 (0.6)
 Other0 (0)0 (0)0 (0)0 (0)3 (0)
 Missing1538 (14.8)185 (2.2)295 (3.1)502 (4.4)189 (1.6)
Nationality
 South African6421 (61.7)5431 (65.1)6367 (66.9)7892 (68.7)8337 (71.9)
 Mozambican3962 (38.1)2913 (34.9)3139 (33)3557 (31)3189 (27.5)
 Other1 (0)0 (0)8 (0.1)32 (0.3)64 (0.6)
 Missing23 (0.2)1 (0)4 (0)2 (0)12 (0.1)
Residency status
 Permanent resident8081 (77.6)7436 (89.1)7879 (82.8)9088 (79.1)9297 (80.1)
 Temporary migrant538 (5.2)591 (7.1)834 (8.8)1461 (12.7)1635 (14.1)
 Other43 (0.4)256 (3.1)574 (6)660 (5.7)522 (4.5)
 Missing1745 (16.8)62 (0.7)231 (2.4)274 (2.4)148 (1.3)
  • *Table 1 presents aggregate data across 5-year increments across the study period (the first column includes 6 instead of 5 years). This allowed for fewer instances of data aggregation into other categories when sparse data existed. Rows with fewer than five individuals in any group of years have been collapsed into the ‘other’ group in each category to protect participant privacy.