Skip to main content

Table 1 Characteristics of 209 infants with early-onset neonatal invasive infection between 1997 and 2017 according to gestational age. Comparison between period 1 (1997–2007) and period 2 (2008–2017)

From: Changes in incidence and etiology of early-onset neonatal infections 1997–2017 – a retrospective cohort study in western Sweden

  Gestational age (weeks)
Time period<  2828–36≥ 37Total
Birth weight (g) (Mean (CI))1997–2017781 (712–850)1992 (1804–2180)3638 (3533–3744)2660 (2487–2832)
Period 1 (1997–2007)770 (644–896)2101 (1850–2353)3644 (3509–3778)2874 (2663–3085)
Period 2 (2008–2017)786 (698–875)1816 (1527–2104)3629 (3453–3806)2376 (2095–2658)
p-value10.10.30.004
Gender Male / Female n (%)1997–201717 (46) / 20 (54)33 (55) / 27 (45)59 (53) / 53 (47)109 (52) / 100 (48)
Period 1 (1997–2007)6 (50) / 6 (50)21 (57) / 16 (43)39 (56) / 31 (44)66 (55) / 53 (45)
Period 2 (2008–2017)11 (44) / 14 (56)12 (52) / 11 (48)20 (48) / 22 (52)43 (48) / 47 (52)
p-value10.80.40.3
PPROMa n (%)1997–20175 (14)15 (25)13 (12)33 (16)
Period 1 (1997–2007)3 (25)10 (27)10 (14)23 (19)
Period 2 (2008–2017)2 (8)5 (22)3 (7)10 (11)
p-value0.30.80.40.1
Caeserean section n (%)1997–201720 (54)27 (45)28 (25)75 (36)
Period 1 (1997–2007)4 (33)14 (38)20 (29)38 (32)
Period 2 (2008–2017)16 (64)13 (57)8 (19)37 (41)
p-value0.20.20.40.2
Febrile mother n (%)1997–20178 (22)15 (25)23 (21)46 (22)
Period 1 (1997–2007)3 (25)10 (27)12 (17)25 (21)
Period 2 (2008–2017)5 (20)5 (22)11 (26)21 (23)
p-value10.80.30.7
Neonatal Distress Apgar < 7, n (%)
at 5 min1997–201715 (41)11 (18)10 (9)36 (17)
Period 1 (1997–2007)3 (25)7 (19)6 (9)16 (13)
Period 2 (2008–2017)12 (48)4 (17)4 (10)20 (22)
p-value0.3110.1
at 10 min1997–20176 (16)2 (3)3 (3)11 (5)
Period 1 (1997–2007)3 (25)1 (3)2 (3)6 (5)
Period 2 (2008–2017)3 (12)1 (4)1 (2)5 (6)
p-value0.4111
Fatal cases n (%)1997–20178 (22)5 (8)2 (2)15 (7)
Period 1 (1997–2007)4 (33)2 (5)2 (3)8 (7)
Period 2 (2008–2017)4 (163 (13)07 (8)
p-value0.40.30.50.8
Total n (%)1997–201737 (18)60 (29)112 (54)209 (100)
Period 1 (1997–2007)12 (10)37 (31)70 (59)119 (100)
Period 2 (2008–2017)25 (28)23 (26)42 (47)90 (100)
p-value0.0020.40.09 
  1. aPremature rupture of membranes (> 18 h before birth)