Table 1 Time-varying and time-invariant participant characteristics by pregnancy category
Characteristic | Not pregnant (n = 18,095 episodes) n (%) | Pregnant (n = 3003 episodes) n (%) | Postpartum (n = 1952 episodes) n (%) |
|---|---|---|---|
Time-varying | |||
 Age 15–24 years | 7595 (41.97) | 1794 (59.74) | 1089 (55.79) |
Time-invariant: Sociodemographic | |||
 Episode Typea | |||
  Resident | 16,745 (92.54) | 2698 (89.84) | 1776 (90.98) |
  Non-resident | 1281 (7.08) | 304 (10.12) | 175 (8.97) |
  Non-resident prior to residency | 69 (0.38) | 1 (0.03) | 1 (0.05) |
 Home settinga | |||
  Peri-urban | 4971 (27.47) | 849 (28.27) | 547 (28.02) |
  Rural | 11,502 (63.56) | 1956 (65.13) | 1282 (65.68) |
  Urban | 614 (3.39) | 81 (2.70) | 59 (3.02) |
  Unknown | 1008 (5.57) | 117 (3.90) | 64 (3.28) |
  Mean distance from level 1 road (standard deviation), kma | 12.7 (22.0) | 11.2 (18.9) | 10.7 (17.6) |
 Maternal educationa | |||
  Less than one year | 805 (4.45) | 27 (0.90) | 19 (0.97) |
  At least primary school | 2223 (12.29) | 173 (5.76) | 126 (6.45) |
  Secondary and beyond | 13,391 (74.0) | 2602 (86.65) | 1678 (85.96) |
  Unknown | 1676 (9.26) | 201 (6.69) | 129 (6.61) |
Time-varying: Pregnancy | |||
 Pregnancy order | |||
  First born | 0 (0) | 796 (40.93) | 708 (40.50) |
  Second/third born | 0 (0) | 790 (40.62) | 710 (40.62) |
  Fourth or later | 0 (0) | 359 (18.46) | 330 (18.88) |
  Not pregnant | 6479 (100) | 0 (0.0) | 0 (0) |
Time-varying: Pregnancy | |||
 Number of live born infants at delivery | |||
  No births | 18,095 (100) | 31 (1.03) | 19 (0.97) |
  Singleton | 0 (0.00) | 2902 (96.64) | 1885 (96.57) |
  Multiple births | 0 (0.00) | 70 (2.33) | 48 (2.46) |
Time-invariant: Pregnancy | |||
 Gravidityb | |||
  None | 2691 (14.87) | 0 (0) | 0 (0) |
  One pregnancy | 4678 (25.85) | 943 (31.40) | 597 (30.58) |
  Two or more pregnancies | 10,726 (59.28) | 2060 (68.60) | 1355 (69.42) |
Time-invariant: HIV status & knowledge | Â | Â | Â |
 Knows HIV status |  |  |  |
  Yes | 13,780 (76.15) | 2533 (84.35) | 1649 (84.48) |
  No | 3478 (19.22) | 355 (11.82) | 229 (11.73) |
  Missing | 837 (4.63) | 115 (3.83) | 74 (3.79) |
 Heard about ART |  |  |  |
  Yes | 15,581 (86.11) | 2669 (88.88) | 1742 (89.24) |
  No | 443 (2.45) | 50 (1.67) | 33 (1.69) |
  Missing | 2071 (11.45) | 284 (9.46) | 177 (9.07) |