Table 3.

- The association between maternal outcomes and mothers age.

Variables	Total	Mother age <40 years	Mother age ≥40 years	Fisher’s exact test	OR (95% CI)
	n (%)
Comorbidity
None	3460 (80.1)	1995 (92.5)	1465 (67.8)	<0.0001	0.170 (0.141-0.204)
Diabetes mellitus	553 (12.8)	159 (7.4)	394 (18.2)	<0.0001	2.799 (2.303-3.401)
Hypertension	33 (6.9)	14 (0.5)	285 (13.2)	<0.0001	23.325 (13.59-40.028)
Antepartum hemorrhage	49 (1.1)	-	49 (2.3)	-	-
Membrane
None	3996 (92.5)	2039 (94.6)	1957 (90.5)	<0.0001	0.548 (0.433-0.693)
PROM	156 (3.6)	39 (1.8)	117 (5.4)	<0.0001	3.106 (2.151-4.485)
SROM	127 (2.9)	39 (1.8)	88 (4.1)	<0.0001	2.030 (1.572-3.374)
ARM	39 (0.9)	39 (1.8)	-	-	-
Amniotic fluid
Clear	3917 (90.7)	2029 (94.1)	1888 (87.3)	<0.0001	0.431 (0.346-0.537)
Meconium	401 (9.3)	127 (5.9)	274 (12.7)	<0.0001	2.319 (1.862-2.888)
Delivery outcomes
Spontaneous vaginal delivery	3399 (78.7)	1789 (83.0)	1610 (74.5)	<0.0001	0.598 (0.516-0.694)
Instrument	32 (0.7)	31 (1.4)	1 (0.01)	<0.0001	0.032 (0.004-0.233)
Caesarian section	887 (20.5)	336 (15.6)	551 (25.5)	<0.0001	1.853 (1.592-2.155)
Total duration of labor
N/A	626 (14.5)	237 (11.0)	389 (18.0)	<0.0001	1.777 (1.493-2.114)
<6 hours	2252 (52.2)	975 (45.2)	1277 (59.1)	<0.0001	1.748 (1.549-1.972)
6-12 hours	1405 (32.5)	938 (43.5)	467 (21.6)	<0.0001	0.358 (0.313-0.409)
13-20 hours	35 (0.8)	6 (0.3)	29 (1.3)	<0.0001	4.872 (2.019-11.758)
Post-partum complications
None	4236 (98.1)	2137 (99.1)	2099 (97.1)	0.599	0.296 (0.177-0.497)
Post-partum hemorrhage	67 (1.6)	4 (0.2)	63 (2.9)	<0.0001	16.148 (5.867-44.442)
Retained placenta	21 (0.5)	15 (0.7)	6 (0.3)	0.050	0.397 (0.154-1.026)

The values presented as number and percentages (%). Fisher’s extract test utilized to see whether there was a significant difference between groups. PROM: premature rupture of amniotic membrane, SRAM: spontaneous rupture of membranes, ARM: artificial rupture of the membrane, OR: odds ratio, CI: confidence interval, N/A: not available