Table 2 Odds ratios for outcomes at 2 years of age (cerebral palsy (CP) and sensory deficiencies (blindness and deafness), and Ages and Stages Questionnaire (ASQ) results below threshold) amongst survivors of babies born at 27–28 weeks’ gestation in medium and high intensity units compared to low intensity units in France in 2011 using the Perinatal Activity Indicator based on babies born at 24–25 weeks’ GA

Survival (among fetuses alive at maternal admission to hospital)

Baseline

1.05

(0.64 – 1.75)

1.20

(0.72 – 1.97)

Baseline + GA

1.01

(0.61 – 1.67)

1.19

(0.72 – 1.95)

Baseline + GA + multiple status

0.99

(0.60 – 1.64)

1.15

(0.70 – 1.89)

Baseline + extra variables

0.96

(0.54 – 1.71)

1.12

(0.63 – 2.00)

Survival without sensorimotor morbidity (among fetuses alive at maternal admission to hospital)

Baseline

1.04

(0.60 – 1.81)

1.39

(0.80 – 2.44)

Baseline + GA

1.25

(0.70 – 2.25)

1.32

(0.73 – 2.38)

Baseline + GA + multiple status

1.20

(0.67 – 2.14)

1.27

(0.70 – 2.28)

Baseline + extra variables

1.09

(0.59 – 2.01)

1.16

(0.62 – 2.16)

CP and sensory disability (among survivors)

Baseline

2.04

(0.73 – 5.75)

1.53

(0.54 – 4.37)

Baseline + GA

2.11

(0.73 – 6.11)

1.54

(0.52 – 4.50)

Baseline + GA + multiple status

2.10

(0.72 – 6.15)

1.53

(0.52 – 4.53)

Baseline + extra variables

2.02

(0.66 – 6.13)

1.68

(0.53 – 5.28)

ASQ below threshold (among survivors)

Baseline

1.27

(0.72 – 2.24)

0.98

(0.57 – 1.68)

Baseline + GA

1.30

(0.74 – 2.24)

0.99

(0.58 – 1.69)

Baseline + GA + multiple status

1.28

(0.72 – 2.28)

0.97

(0.56 – 1.67)

Baseline + extra variables

1.35

(0.76 – 2.40)

1.01

(0.58 – 1.76)