Table 1.  Characteristics of children in the original trial of types of infant formula who were enrolled into the follow up study. Figures are means (SD) except where otherwise indicated Characteristics Formula with LCPUFA supplementation (n=71) Formula without supplementation (n=76) Demographic characteristics Age of mother (years) at follow up 34.2 (5.8) 34.6 (5.4) Age of mother (years) at completion of education 18.4 (3.4) 18.0 (2.8) Age of father (years) at follow up 36.1 (5.8) 36.0 (4.7) Age of father (years) at completion of education 17.7 (3.1) 17.9 (2.6) No of mothers married or with partner/No of single mothers* 61/8 69/6 No of children in home  2.1 (1.0)  2.0 (0.9) No of smokers in household 0.82 0.74 Sex ratio (male/female) in group 41/30 37/39 Gestation (weeks) 39.4 (1.5) 39.5 (1.3) Child's age at assessment (months) 70.1 (3.8) 70.0 (3.1) Anthropometry at birth Weight (g) 3293 (438) 3291 (359) Crown-heel length (cm) 50.5 (2.8) 50.5 (2.5) Occipitofrontal circumference (cm) 34.7 (1.4) 34.8 (2.4) Mid-upper arm circumference (cm) 10.5 (1.1) 10.4 (0.9) Subscapular skinfold (mm)  4.7 (1.2)  4.6 (0.9) Triceps skinfold (mm)  4.8 (1.2)  4.8 (0.9) LCPUFA=long chain polyunsaturated fatty acid. * Marital status of three mothers not known.