Table 2.

Impacts of birthweight in the current delivery on the occurrence and recurrence of postpartum hemorrhage (PPH) (> 500 ml)

Recurrence in the same mother
Birthweight in current delivery	PPH in mother’s previous delivery	PPH in current delivery
		Total	PPH (n)	%	OR	95% CI		aORa	95% CI
< 4000 g	No	885,286	49,911	5.6	1	Reference		1	Reference
4000–4499 g	No	206,955	18,705	9.0	1.66	1.63	1.69	1.70	1.67	1.73
4500–4999 g	No	44,314	5667	12.8	2.46	2.38	2.53	2.58	2.50	2.66
≥ 5000 g	No	5762	943	16.4	3.28	3.05	3.52	3.63	3.37	3.90
< 4000 g	Yes	70,363	14,093	20.0	1	Reference		3.01	2.95	3.07
4000–4499 g	Yes	24,833	6471	26.1	1.40	1.36	1.45	4.56	4.42	4.70
4500–4999 g	Yes	6705	2097	31.3	1.81	1.71	1.92	6.24	5.91	6.59
≥ 5000 g	Yes	1026	367	35.8	2.21	1.94	2.53	8.06	7.06	9.21

^aaOR, OR adjusted for marital status, period (1967–1977, 1978–1987, 1988–1997, 1998–2007 and 2008–2017), maternal age, parity and WHO region of maternal birth