Table 2.

Phenotypic associations of health conditions with educational attainment at 16 and school absence at 14–16 (N = 6113).

	GCSE points scorea		School absence at age 14–16b
	Beta	CI	% increase	CI
Health conditions at age 10
Standardized values of SDQ-HI scorec	−25.58	−28.42, −22.73	6.08	3.51, 8.72
Standardized values of MFQ scored	−16.39	−19.67, −13.10	6.02	3.24, 8.88
Standardized values of SCDC scoree	−20.73	−24.09, −17.37	9.34	6.39, 12.37
Migraines at age 10	−6.58	−19.12, 5.97	15.42	3.25, 29.03
Asthma in past 12 months	2.06	−5.01, 9.14	12.15	4.48, 20.39
BMI z-scoref	−2.30	−4.11, −0.49	2.82	0.96, 4.71
Health conditions at age 13
Standardized values of SDQ-HI scorec	−28.75	−31.56, −25.95	8.58	5.89, 11.34
Standardized values of MFQ scored	−6.83	−9.90, −3.76	7.10	4.66, 9.61
Standardized values of SCDC scoree	−25.23	−28.84, −21.62	12.96	9.62, 16.4
Asthma in past 12 months	−1.27	−9.18, 6.63	10.60	2.67, 19.14
BMI z-scoref	−3.99	−5.88, −2.11	3.99	2.15, 5.86

^aCoefficients represent change in GCSE capped points score adjusted for gender, maternal education, maternal housing tenure, maternal age, maternal parity, whether smoked in pregnancy.

^bCoefficients represent proportional change in absenteeism (0% = no change) with presence of the health condition, or per SD increase in continuous exposures.

^cSDQ-HI: Strengths and Difficulties Questionnaire hyperactivity subscale.

^dMood and Feelings Questionnaire.

^eSocial Communication Disorders Checklist.

^fBased on 1990 UK Growth Reference, values represent SD difference from age-specific and gender-specific reference mean.