Table 2

Annual summaries of the descriptive characteristics of selected babies from 2010 to 2017. SD, standard deviation

Descriptive characteristicsYear
20102011201220132014201520162017
Babies cooled
 Count403557573680763771735719
Mortality
 Count (%)52 (12.9)63 (11.3)63 (10.9)78 (11.5)60 (7.9)66 (8.6)70 (9.5)48 (6.7)
Birth weight
 Mean34123358339733463349338133513399
 SD666643650601610624630607
Gestation weeks
 Mean39.539.539.439.439.439.339.339.4
 SD1.61.61.61.51.51.61.61.6
Female sex
 Count (%)191 (47.4)256 (46.0)254 (44.3)328 (48.2)345 (45.2)326 (42.3)322 (43.8)304 (42.3)
Vaginal delivery
 Count (%)186 (46.2)273 (49.1)252 (44.0)330 (48.5)366 (48.0)323 (41.9)337 (45.9)330 (45.9)
Multiple birth
 Count (%)21 (5.2)22 (4.0)20 (3.5)25 (3.7)21 (2.8)21 (2.7)24 (3.3)15 (2.1)
Primiparous
 Count (%)233 (57.8)315 (56.6)319 (55.7)351 (51.6)423 (55.4)363 (47.1)334 (45.4)373 (51.9)
Smoking during pregnancy
 Count (%)54 (13.4)81 (14.5)73 (12.7)88 (12.9)105 (13.8)88 (11.4)95 (12.9)63 (8.8)
 Missing (%)15.111.712.610.712.814.312.716.0
Intrapartum antibiotics given
 Count (%)42 (10.4)61 (11.0)65 (11.3)71 (10.4)96 (12.6)66 (8.6)80 (10.9)86 (12.0)
Maternal fever in labour
 Count (%)22 (5.5)28 (5.0)31 (5.4)26 (3.8)53 (7.0)33 (4.3)28 (3.8)44 (6.1)