Table 3.

Associations of asthma status in different Grades in school with grade point sum and non-eligibility to upper secondary school (USS).

Grade point sum	Unadjusted model			Adjusted modela				Sibling comparisonb
	n	β	[95% CI]	n	β	[95% CI]	Cohen’s d	nc	β	[95% CI]	Cohen’s d
Asthma in Grades 7–8
No	539,422	0.0		526,503	0.0			11,225	0.0
Mild/moderate controlled	27,442	3.4	[2.6, 4.1]	26,852	4.6	[4.0, 5.3]	0.07	10,120	0.3	[−0.8, 1.4]	0.00
Severe controlled	897	13.0	[9.2, 16.7]	885	12.5	[9.3, 15.7]	0.20	403	7.3	[2.3, 12.3]	0.12
Mild/moderate uncontrolled	2,627	−14.2	[−16.7, −11.7]	2,553	−6.7	[−8.9, −4.5]	0.11	1,086	−0.5	[−3.9, 2.9]	0.01
Severe uncontrolled	207	0.6	[−8.6, 9.7]	201	4.5	[−3.1, 12.2]	0.07	84	2.9	[−10.2, 15.9]	0.05
Asthma in Grade 9
No	551,128	0.0		537,931	0.0			7,239	0.0
Mild/moderate controlled	16,281	5.8	[4.8, 6.7]	15,957	6.1	[5.3, 6.9]	0.10	6,210	1.0	[−0.4, 2.3]	0.02
Severe controlled	1,294	12.1	[8.9, 15.4]	1,270	10.3	[7.6, 13.0]	0.17	553	1.0	[−3.9, 5.9]	0.02
Mild/moderate uncontrolled	1,657	−17.2	[−20.6, −13.8]	1,605	−9.9	[−12.8, −7.0]	0.16	638	−7.6	[−12.6, −2.6]	0.12
Severe uncontrolled	235	−3.7	[−11.7, 4.3]	231	−2.9	[−9.8, 3.9]	0.05	110	−2.7	[−13.8, 8.4]	0.04
Non-eligibility to USS	n	OR	[95% CI]	n	OR	[95% CI]		nc	OR	[95% CI]
Asthma in Grades 7–8
No	539,422	1.00		526,503	1.00			1,177	1.00
Mild/moderate controlled	27,442	0.82	[0.78, 0.86]	26,852	0.81	[0.77, 0.85]		1,031	1.03	[0.90, 1.18]
Severe controlled	897	0.62	[0.47, 0.83]	885	0.68	[0.51, 0.91]		26	0.71	[0.28, 1.77]
Mild/moderate uncontrolled	2,627	1.40	[1.25, 1.58]	2,553	1.15	[1.01, 1.30]		155	0.73	[0.51, 1.05]
Severe uncontrolled	207	1.03	[0.64, 1.64]	201	0.87	[0.51, 1.48]		9	1.75	[0.56, 5.43]
Asthma in Grade 9
No	551,128	1.00		537,931	1.00			676	1.00
Mild/moderate controlled	16,281	0.77	[0.72, 0.82]	15,957	0.78	[0.73, 0.83]		540	0.95	[0.79, 1.14]
Severe controlled	1,294	0.73	[0.59, 0.91]	1,270	0.81	[0.64, 1.02]		52	1.05	[0.58, 1.91]
Mild/moderate uncontrolled	1,657	1.75	[1.53, 2.00]	1,605	1.44	[1.23, 1.67]		96	1.96	[1.22, 3.14]
Severe uncontrolled	235	1.00	[0.64, 1.56]	231	0.93	[0.57, 1.51]		10	2.67	[0.59, 12.05]

^aAdjusted models were adjusted for gender, ADHD, gender x ADHD interaction, mother’s and father’s education and asthma, family income the year the child started school.

^bSibling comparisons were adjusted for all familial factors shared by the siblings + gender, ADHD, gender x ADHD interaction and family income the year the child started school.

^cNumber of children in pairs discordant for both asthma variable and school performance measure.