Table 1 Maternal and reproductive characteristics of adolescent mothers 12–19 and mothers 20–34 years of age

No. of births

100,189 (100)

11,028 (11.0)

89,161 (89.0)

–

No. of mothers

96,938 (100)

10,783 (11.1)

86,155 (88.9)

–

Maternal age

 Median; Inter-quartile range (IQR)

25; 22–29

18; 18–19

26; 23–29

–

Hospital^b

 Lubaga

6410 (6.4)

134 (1.2)

6276 (7.0)

< 0.001

 Mengo

7905 (7.9)

111 (1.0)

7794 (8.7)

 Nsambya

7531 (7.5)

99 (0.9)

7432 (8.3)

 Mulago national referral

78,343 (78.2)

10,684 (96.9)

67,659 (75.9)

Maternal HIV status^a

 Positive

8167 (8.4)

480 (4.5)

7687 (8.9)

< 0.001

 Negative

88,631 (91.4)

10,282 (95.3)

78,349 (91.0)

 Unknown

140 (0.1)

21 (0.2)

119 (0.1)

Maternal antiretroviral therapy (ART) at delivery^β

 Yes

7786 (95.3)

438 (91.3)

7348 (95.6)

< 0.001

 No

381 (4.7)

42 (8.8)

339 (4.4)

Maternal timing of initiation on ART^∏

 Before conception

4161 (53.4)

133 (30.4)

4028 (54.8)

< 0.001

 After conception

3625 (46.6)

305 (69.6)

3320 (45.2)

Mother referred from other health center^a

 Yes

44,700 (46.1)

7541 (69.9)

37,159 (43.1)

< 0.001

 No

52,238 (53.9)

3242 (30.1)

48,996 (56.9)

Maternal parity^a

 Primipara (1)

32,765 (33.8)

9023 (83.7)

23,742 (27.6)

< 0.001

 Multipara (≥ 2)

64,173 (66.2)

1760 (16.3)

62,413 (72.4)

Mode of delivery^b

 Vaginal

68,756 (68.6)

8575 (77.8)

60,181 (67.5)

< 0.001

 Caesarean section

31,433 (31.4)

2453 (22.2)

28,980 (32.5)

Singleton/multiple deliveries^b

 Singleton

93,548 (93.4)

10,516 (95.4)

83,032 (93.1)

< 0.001

 Multiple

6641 (6.6)

512 (4.6)

6129 (6.9)

Received antenatal care (maternal)^a

 Yes

94,734 (97.7)

10,403 (96.5)

84,331 (97.9)

< 0.001

 No

2204 (2.3)

380 (3.5)

1824 (2.1)

Timing of first antenatal care (ANC) visit^{a, ξ}

 ANC within 1st Trimester

6446 (7.9)

580 (6.6)

5866 (8.0)

< 0.001

 ANC within 2nd Trimester

36,783 (44.9)

3976 (45.3)

32,807 (44.8)

 ANC within 3rd Trimester

38,696 (47.2)

4217 (48.1)

34,479 (47.1)

Number of maternal antenatal visits^a,π

 No ANC Visit

2204 (2.3)

380 (3.5)

1824 (2.1)

< 0.001

 1–3 Visits

52,764 (54.6)

6626 (61.5)

46,138 (53.7)

 4 + Visits

41,731 (43.2)

3761 (34.9)

37,970 (44.2)