Risk Factors for premature birth in a hospital

retrospective case-control study of 600 pregnant women assisted in a hospital, with 298 pregnant women in the case group (who gave birth prematurely <37 weeks) and 302 pregnant women who gave birth to a full-term newborn in the control group. Stata software version 12.2 was used. The Chi-square test was used in bivariate analysis and logistic regression was used in multivariate analysis, from which Odds Ratios (OR) and Confidence Intervals (CI) of 95% were derived.

Results:

risk factors associated with premature birth were current twin pregnancy (adjusted OR= 2.4; p= 0.02), inadequate prenatal care (< 6 controls) (adjusted OR= 3.2; p <0.001), absent prenatal care (adjusted OR= 3.0; p <0.001), history of premature birth (adjusted OR= 3.7; p <0.001) and preeclampsia (adjusted OR= 1.9; p= 0.005).

Conclusion:

history of premature birth, preeclampsia, not receiving prenatal care and receiving inadequate prenatal care were risk factors for premature birth.

Descriptors:
Prematurity; Pregnancy Gemelar; Preeclampsia; Preterm Birth

Escola de Enfermagem de Ribeirão Preto / Universidade de São Paulo Av. Bandeirantes, 3900, 14040-902 Ribeirão Preto SP Brazil, Tel.: +55 (16) 3315-3451 / 3315-4407 - Ribeirão Preto - SP - Brazil
E-mail: rlae@eerp.usp.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] Corresponding Author: Margarita E Ahumada-Barrios Universidad Católica Sedes Sapientiae Facultad de Ciencias de la Salud Esq. Constelaciones y Sol de Oro s/n Urb. Sol de Oro Los Olivos Lima, Perú Lima 39 E-mail: margaritaeab@gmail.com

Risk factor	Cases n (%)	Controls n (%)	p-value
Age (years)
mean+- S.D.	25.7 ± 6.8	26.6 ± 7.3	0.15
Parity
0 children	97 (32.6)	107 (35.4)	0.54
1 - 2 children	155 (52.0)	157 (52.0)
≥ 3 children	46 (15.4)	38 (12.6)
Current twin pregnancy
No	276 (92.6)	288 (95.4)	0.16
Yes	22 (7.4)	14 (4.6)
Previous abortion
No	194 (65.1)	172 (57.0)	0.04*
Yes	104 (34.9)	130 (43.0)
PNC^†
Adequate (>=6)	129 (43.3)	213 (70.5)	< 0.001‡
Inadequate (<6)	122 (40.9)	64 (21.2)
Absent (=0)	47 (15.8)	25 (8.3)
History of premature birth
No	191 (64.1)	260 (86.1)	< 0.001‡
Yes	107 (35.9)	42 (13.9)
Anemia
No	101 (33.9)	126 (41.7)	0.05
Yes	197 (66.1)	176 (58.3)
UTI^§
No	168 (56.4)	177 (58.6)	0.60
Yes	130 (43.6)	125 (41.4)
PROM^\|\|
No	239 (80.2)	232 (76.8)	0.30
Yes	59 (19.8)	70 (23.2)
Preeclampsia
No	227 (76.2)	263 (87.1)	< 0.001‡
Yes	71 (23.8)	39 (12.9)
Oligohydramnios
No	266 (89.3)	282 (93.4)	0.10
Yes	32 (10.7)	20 (6.6)
Smoking
No	287 (96.3)	295 (97.7)	0.30
Yes	11 (3.7)	7 (2.3)
Bleeding
No	283 (95.0)	299 (99.0)	0.004‡
Yes	15 (5.0)	3 (1.0)

Risk factor	Crude OR (95% CI)	Adjusted OR (95% CI)*	p-value*
Age (years)	1.0 (0.9 - 1.0)	1.0 (1.0 -1.1)	0.03†
Parity
0 children	1.0	-
1 - 2 children	1.1 (0.8 - 1.6)
≥ 3 children	1.3 (0.8 - 2.2)
Current twin pregnancy
No	1.0	1.0
Yes	1.6 (0.8 - 3.3)	2.4 (1.1 - 5.1)	0.02†
Previous abortions
No abortion	1.0	1.0
Abortion	0.7 (0.5 - 1.0)	0.7 (0.5 - 1.0)	0.08
PNC^‡
Normal (>=6)	1.0	1.0
Inadequate (<6)	3.2 (2.2 - 4.6)	3.2 (2.1 - 4.7)	< 0.001§
Absent	3.1 (1.8 - 5.3)	3.0 (1.7 - 5.4)	< 0.001§
History of premature birth
No	1.0-	1.0
Yes	3.5 (2.3 - 5.2)	3.7 (2.3 - 5.8)	< 0.001§
Anemia
No	1.0	1.0
Yes	1.4 (1.0 - 2.0)	1.2 (0.8 - 1.7)	0.47
UTI^\|\|
No	1.0-	-
Yes	1.1 (0.8 - 1.5)
PROM^¶
No	1.0-	-
Yes	0.8 (0.6 - 1.2)
Preeclampsia
No	1.0	1.0
Yes	2.1 (1.4 - 3.2)	1.9 (1.2 - 3.1)	0.005§
Oligohydramnios
No	1.0	1.0
Yes	1.7 (1.0 - 3.0)	1.8 (0.9 - 3.4)	0.09
Smoking
No	1.0	-
Yes	1.6 (0.6 - 4.2)
Bleeding
No	1.0	1.0
Yes	5.3 (1.5 - 18.4)	3.0 (0.8 - 11.5)	0.11

Brasil

Brasil

Risk Factors for premature birth in a hospital1 1 Article extracted from undergraduate thesis "Risk Factors for Premature Birth in a Hospital of North Lima" presented to Facultad de Ciencias de la Salud, Universidad Católica Sedes Sapientiae, Lima, Peru.

Abstract

Objective:

Methods:

Results:

Conclusion:

Risk Factors for premature birth in a hospital^¹ 1 Article extracted from undergraduate thesis "Risk Factors for Premature Birth in a Hospital of North Lima" presented to Facultad de Ciencias de la Salud, Universidad Católica Sedes Sapientiae, Lima, Peru.