Table 1 Demographic data.

	Gynecologists (n = 418)	Diabetologists (n = 42)	p-value*
* Comparison of gynecologists with diabetologists
Response rate (dispatched questionnaires)	54.1 % (418 von 773)	55.3 % (42 von 76)
male colleagues	40.1 % (108 von 269)	53.8 % (28 von 52)
female colleagues	61.6 % (310 von 504)	58.3 % (14 von 24)
Distribution between the sexes			< 0.001
male	108 (25.8 %)	28 (66.7 %)
female	310 (74.2 %)	14 (33.3 %)
Years of working as a medical specialist			0.71
< 5 years	24 (5.8 %)	0 (0 %)
5–10 years	72 (17.4 %)	7 (16.7 %)
11–12 years	142 (34.4 %)	18 (42.9 %)
> 20 years	175 (42.4 %)	17 (40.5 %)
Patient age			< 0.001
20–40 years	172 (43.7 %)	6 (15.0 %)
45–50 years	208 (52.8 %)	6 (15.0 %)
> 50 years	14 (3.6 %)	28 (70.0 %)
Percentage of patients who had given birth to at least one child previously			0.92
< 20 %	10 (2.5 %)	5 (15.2 %)
20–40 %	116 (29.3 %)	7 (21.2 %)
40–60 %	162 (40.9 %)	8 (24.2 %)
> 60 %	108 (27.3 %)	13 (39.4 %)
Knowledge of the S3 guideline on GDM			0.08
good	236 (57.4 %)	31 (73.8 %)
fairly good	158 (38.4 %)	8 (19.0 %)
fairly poor	13 (3.2 %)	1 (2.4 %)
not familiar with the guideline	4 (1.0 %)	2 (4.8 %)