Table 2. Comparison of age at first pregnancy and age at marriage in GDM and normal control population (n = 290).

Age at first pregnancy	Normal		GDM
	Frequency	Percentage	Frequency	Percentage
≤ 18	19	6.3	39**	13.4**
19–24	174	58.0	140	48.1
25–29	90	30.0	90	30.9
30–34	15	5.0	20	6.9
> 35	2	0.7	2	0.7
Age at marriage
≤ 18	22	7.3	48*	16.5*
19–24	184	61.3	158	54.3
25–29	73	24.3	74	25.4
30–34	9	3.1	10	3.4
> 35	2	1.7	1	1.3

*p < 0.050.

**p < 0.010 chi-square analysis of data.