Table 2 Characteristics of subjects who were and were not recruited for school age follow up in the virus study

Sex (M: F)

28: 28

59: 44

0.378^*

 White

23/56 (41%)

32/103 (31%)

Overall

 Black

22/56 (39%)

54/103 (52%)

0.278^c

 Other

11/56 (20%)

17/103 (17%)

Index of multiple deprivation (decile)

3 (2–5)

3 (2–5)

0.838^b

Birth weight (g)

1836 (707)

1937 (571)

0.036^a

Gestational age (weeks)

33.86 (30.71–34.86)

33.71 (31.71–35.29)

0.435^b

Multiple birth

22/56 (39%)

25/103 (24%)

0.048^*

Surfactant given

13/56 (23%)

20/103 (19%)

0.573^*

Maternal smoking in pregnancy

8/56 (14%)

17/103 (17%)

0.713^*

Postnatal steroids

2/56 (4%)

1/103 (1%)

0.250^*

Oxygen dependency at 28 days

2/56 (4%)

0/103 (0%)

0.054^*

Oxygen dependency at hospital discharge

11/56 (20%)

5/103 (5%)

0.003^*