Table 1.

Description of the study population in 2008 and 2014

	Year 2008 (n = 81,129)	Year 2014 (n = 92,589)
Gestational diabetes mellitus	n = 2,745 (3.4 %)	n = 3,682 (4.0 %)
Obese (BMI > 30 kg/m2)	n = 8,819 (10.9 %)	n = 11,169 (12.1 %)
Age > 35 years	n = 21,163 (26.1 %)	n = 25,615 (27.7 %)
Migration background	n = 14,401 (17.8 %)	n = 17,772 (19.2 %)
Single mother	n = 7,731 (9.9 %)	n = 6,864 (8.2 %)
Multiparous woman	n = 40,635 (50.1 %)	n = 45,219 (48.8 %)
Smoking during pregnancy	n = 5,457 (6.7 %)	n = 4,262 (4.6 %)
BIMD quintile 1 (least deprived)	n = 10,306 (12.7 %)	n = 12,716 (13.7 %)
BIMD quintile 2	n = 9,679 (11.9 %)	n = 10,329 (11.2 %)
BIMD quintile 3	n = 23,948 (29.5 %)	n = 27,831 (30.1 %)
BIMD quintile 4	n = 13,198 (16.3 %)	n = 14,829 (16.0 %)
BIMD quintile 5 (most deprived)	n = 23,998 (29.6 %)	n = 26,884 (29.0 %)

BIMD Bavarian Index of Multiple Deprivation