Table 5.

Logistic regression analysis as predictor of GDM in pregnant women

Variablesa	GDM (+) (n = 121)	GDM (−) (n = 831)	p valuea	OR (CI)
Gravidityc
One	33	418	< 0.001	0.37 (0.24–0.56)
More than one	88	412
Family history of DM
Positive	20	67	< 0.001	2.25 (1.31–3.87)
Negative	101	764
History of abortion
Positive	33	72	< 0.001	3.95 (2.47–6.30)
Negative	88	759
Age range (kg)
≥ 25	104	562	< 0.001	2.92 (1.71–4.98)
< 25	17	269
BMI range (kg/m2)
≥ 25	99	372	< 0.001	5.55 (3.43–8.98)
< 25	22	459
FPG at first prenatal visit
≥ 75	120	545	< 0.001b	62.97 (8.75–453.05)
< 75	1	286
≥ 80	106	230	< 0.001	18.46 (10.53–32.38)
< 80	15	601
≥ 85	100	79	< 0.001	45.32 (26.82–76.58)
< 85	21	752
≥ 90	85	12	< 0.001	161.14 (80.79–321.42)
< 90	36	819
≥ 92	77	8	< 0.001	180.03 (81.81–396.16)
< 92	44	823
FPG at 24th–28th of gestational weeks
≥ 75	120	563	< 0.001b	57.12 (7.93–411.03)
< 75	1	268
≥ 80	118	310	< 0.001b	66.10 (20.83–209.7)
< 80	3	521
≥ 85	117	133	< 0.001b	153.5 (55.7–423.03)
< 85	4	698
≥ 90	110	14	< 0.001	583.57 (258.46–1317.59)
< 90	11	817

OR odds ratio; CI confidence interval; GDM gestational diabetes mellitus; DM diabetes mellitus; BMI body mass index; FPG fasting plasma glucose

^ap value refers to the relationship between each variables and incidence of GDM

^bp value refers to the relationship between variables based on Fisher’s Exact test

^cRefers to one missing data in the category of gravid