Table 3

Prevalence of protective response grades 1 to 4

Grade 1 (calculated PACO2 ≥60 mmHg)Grade 2 (VAS <0.1)Grade 3 (VAS >0.1)Grade 4 (awake)Total no of tests
The likelihood of infants waking (grade 4) v not waking (grades 1, 2, and 3) was for:
Age (3 months v 1 month), 1.0 (NS)
Sleep state (AS v QS), 6.0 (p<0.0001)
Group (SGA v AGA), 1.6 (NS)
Age
    1 month2%6%73%19%293
    3 months1%3%81%15%256
Sleep state
    QS1%3%90%6%283
    AS2%6%63%29%264
Group
    AGA1%5%79%15%347
    SGA2%3%74%21%201