Table 1 Baseline characteristics of participants stratified by their anaemia status (n = 1222)

Participants

1222 (100.0)

570 (46.6)

652 (53.4)

Mean age (± SD) in years

30.7 ± 5.3

30.3 ± 5.2

31.0 ± 5.4

0.941

Mean gestation age at enrolment (± SD) in weeks

31.7 ± 2.5

31.5 ± 2.5

31.9 ± 2.6

0.193

Mean BMI (± SD) in kg/m²

27.9 ± 5.9

26.9 ± 5.5

28.8 ± 6.0

0.246

Obesity

Yes (BMI ≥ 30 kg/m²)

374 (30.6)

142 (38.0)

232 (62.0)

< 0.001

No (BMI < 30 kg/m²)

848 (69.4)

428 (50.5)

420 (49.5)

Enrolment site

LUTH

148 (12.1)

67 (45.3)

81 (54.7)

< 0.001

LASUTH

161 (13.2)

64 (39.8)

97 (60.2)

LIMH

522 (42.7)

271 (51.9)

251 (48.1)

FMC-Eb

185 (15.1)

62 (33.5)

123 (66.5)

68-NARHY

206 (16.9)

106 (51.5)

100 (48.5)

Level of enrolment facility

Secondary

728 (59.6)

377 (51.8)

351 (48.2)

< 0.001

Tertiary

494 (40.4)

193 (39.1)

301 (60.9)

Parity

Nullipara

482 (29.8)

231 (47.9)

251 (52.1)

0.632

Primipara

376 (70.2)

168 (44.7)

208 (55.3)

Multipara

364 (70.2)

171 (47.0)

193 (53.0)

Marital status

Single

8 (0.7)

3 (37.5)

5 (62.5)

0.198

Married

1207 (98.8)

566 (46.9)

641 (53.1)

Widowed

7 (0.6)

1 (14.3)

6 (85.7)

Educational status

No formal education

4 (0.3)

1 (25.0)

3 (75.0)

0.158

Primary education

18 (1.5)

5 (27.8)

13 (72.2)

Secondary education

364 (29.8)

171 (47.0)

193 (53.0)

Tertiary education

763 (62.4)

3666 (48.0)

397 (52.0)

Postgraduate education

73 (6.0)

27 (37.0)

46 (63.0)

Employment status

Unemployed

96 (7.9)

46 (47.9)

50 (52.1)

0.100

Housewife

38 (3.1)

25 (65.8)

13 (34.2)

Artisan

71 (5.8)

33 (46.5)

38 (53.5)

Trading

583 (47.7)

253 (43.4)

330 (56.6)

Civil servant

199 (16.3)

99 (49.7)

100 (50.3)

Private professional

235 (19.2)

114 (48.5)

121 (51.5)

Mode of conception

Assisted

18 (1.5)

9 (50.0)

9 (50.0)

0.774

Spontaneous

1204 (98.5)

561 (46.6)

643 (53.4)

Type of pregnancy

Multiple

26 (2.1)

13 (50.0)

13 (50.0)

0.729

Singleton

1196 (97.9)

557 (46.6)

639 (53.4)

Presence of uterine fibroids

Yes

150 (12.3)

64 (42.7)

86 (57.3)

0.297

No

1072 (87.7)

506 (47.2)

566 (52.8)

Antepartum bleeding in the index pregnancy

Yes

106 (8.7)

55 (51.9)

51 (48.1)

0.258

No

1116 (98.3)

515 (46.1)

601 (53.9)

Previous hypertensive disorder in pregnancy

Yes

43 (3.5)

17 (39.5)

26 (60.5)

0.341

No

1179 (96.5)

553 (46.9)

626 (53.1)

Current hypertensive disorder in pregnancy

Yes

72 (5.9)

29 (40.3)

43 (59.7)

0.264

No

1150 (94.1)

541 (47.0)

609 (53.0)

Previous caesarean delivery

Yes

277 (22.7)

120 (43.3)

157 (56.7)

0.207

No

945 (77.3)

450 (47.6)

495 (52.4)

Previous PPH

Yes

27 (2.2)

9 (33.3)

18 (66.7)

0.161

No

1195 (97.8)

561 (46.9)

634 (53.1)