Table 3.

Educational Characteristics of Age 42 Analytic Sample: NCDS, 1958-2000 (N=10,590)^a

Educational Performance	No Health Limitations	Breastfed	Low BW	Heavy Prenatal Smoking	Age 7 Limitation	Age 11 Limitation	Ages 11/7 Limitation	Age 16 Limitation	Ages 16/11 Limitation	All Ages
Age 7 Performance
Mean Reading Comp. (S.D.)	24.3 (6.4)	24.1 (6.6)	21.9 (7.5)	22.8 (7.1)	20.8 (8.1)	22.8 (7.8)	17.6 (10.3)	23.7 (6.9)	21.5 (8.9)	15.8 (10.9)
Mean Math (S.D.)	5.3 (2.4)	5.3 (2.4)	4.5 (2.4)	4.9 (2.5)	4.6 (2.6)	4.9 (2.6)	3.9 (3.1)	5.2 (2.5)	4.5 (2.8)	3.2 (3.0)
Age 11 Performance
Mean Reading Comp. (S.D.)	16.7 (6.0)	16.8 (5.9)	15.0 (6.1)	15.4 (6.1)	14.3 (6.5)	15.5 (6.7)	12.8 (7.6)	16.2 (6.3)	13.4 (7.6)	11.2 (8.8)
Mean Math (S.D.)	17.8 (10.1)	18.1 (9.9)	14.5 (9.4)	15.7 (9.8)	13.8 (10.2)	16.2 (10.8)	12.8 (10.9)	16.2 (10.8)	13.7 (11.3)	10.2 (10.9)
School Type at Age 16
Secondary Modern	17	19	21	21	19	17	12	18	15	5
Grammar/Technical	10	12	6	6	7	9	2	11	7	4
Comprehensive	46	49	55	52	45	45	43	49	41	43
Other	27	20	18	21	29	29	42	21	37	49
Post-School Expectations
Will get a job	18	20	20	26	27	22	26	20	29	29
Will continue full-time educ.	32	30	25	27	26	31	27	30	23	17
Not sure	51	50	55	47	47	47	48	50	48	54
Parental School Expectations
Will leave at minimum age	21	21	29	28	29	28	35	24	29	25
Will stay past minimum age	78	79	71	72	71	72	65	76	71	75
Age 16/18 Performance
Avg. Num. O-Levels by Age 16	1.9 (2.8)	2.0 (2.6)	1.4 (1.7)	1.2 (2.3)	1.3 (2.2)	1.7 (2.5)	1.1 (2.1)	1.8 (2.7)	1.3 (2.4)	0.9 (2.1)
Avg. Num. A-levels by Age 18	0.4 (0.9)	0.4 (0.9)	0.2 (0.5)	0.2 (0.6)	0.2 (0.7)	0.4 (0.9)	0.2 (0.6)	0.3 (0.9)	0.2 (0.7)	0.15 (0.7)
N	8453	7336	522	1225	360	430	74	1002	129	66

^aNumbers in cells are percentages unless mean is indicated.