Table 1.

Register-linkage analysis was performed for all invasive GAS cases (n = 267) recorded in women aged 20–40 years between 2004 and 2015

emm type	All n (%)	Delivery n (%)	Infections related to delivery or puerperium, n (%)	Delivery or infection related to delivery or puerperium, n (%)
emm28	113 (42.3)	63 (56.3)*	52 (55.3)*	67 (55.8)*
emm89	39 (14.6)	13 (11.6)	13 (13.8)	15 (12.5)
emm12	16 (6.0)	5 (4.4)	5 (5.3)	7 (5.8)
emm1	22 (8.2)	9 (8.0)	6 (6.4)	9 (7.5)
emm4	14 (5.2)	9 (8.0)	8 (8.5)	9 (7.5)
emm75	8 (3.0)	2 (1.8)	2 (2.1)	2 (1.7)
other emm types**	55 (20.6)	11 (9.8)	8 (8.5)	11 (9.2)
Total	267	112	94	120

The Hospital Discharge Register was used to search for specific ICD-10 codes related to delivery, or infections related to delivery or puerperium (Supplementary Table S1). Table 1 summarizes the distribution of emm types in cases for which specific ICD-10 codes were recorded.

^*p < 0.05.

^**other emm types (number of cases): emm119.1 (7), emm84 (6), emm27G.6 (4), emm50 (4), emm77 (4), emm118 (3), emm22 (3), emm66 (3), emm25 (2), emm110.1 (2), emm73(2), emm81 (2), emm78.3 (2), emm104 (1), emm102.3 (1), emm11 (1), emm112.2 (1), emm33 (1), emm2 (1), emm60.1 (1), emm177 (1), emm87 (1), emm79.2 (1), emm8 (1).