Table 4.

Academic qualifications achieved by carriers of BP1–BP2 deletion in comparison with non-carriers.

	BP1–BP2 deletion	No BP1–BP2 deletion
Highest qualification achieved	Frequency	Frequency	Odds	p value
College/University degree	414	157,988	0.57	5.60E−22
A levels/AS levels	185	54,077	0.76	4.12E−04
Other categories	1209	268,962	–	–

‘College/University degree’ and ‘A levels/AS levels’ highest qualification attainment groups are each compared with a combined ‘Other categories’ group. Estimated odds ratios reflect the chance of the BP1–BP2 deletion group achieving the qualification compared with non-carriers.