Among 99 infants , pre-ART correlates of later milestone attainment included : underweight and stunted ( neck control , walking and speech , all P values < 0.05 ) , missed prevention of mother-to-child transmission ( P = 0.04 ) ( neck control ) , previous hospitalization , World Health Organization ( WHO ) Stage III/IV , low CD4 count , and wasting ( speech and walking , all P values < 0.05 ) , and low maternal CD4 ( speech , P = 0.04 ) .