Table 6.

 Main effect model showing correlation between behavioural problem at one year and individual variables by using logistic regression with mutually adjusted odds ratios

Variables	No with behavioural problems/Total	Odds ratio (95% CI)	P value
Age (years):
2-5	5/47	1
>5	5/38	0.99 (0.98 to 1.01)	0.79
Sex:
Male	3/48	3.38 (0.83 to 3.88)	0.08
Female	7/37	1
Cognitive impairment:
Absent	7/57	1
Present	3/28	0.98 (0.95 to 1.00)	0.19
Minor motor impairment:
Absent	9/71	1
Present	1/14	2.49 (0.55 to 11.13)	0.23
Pre-existing behavioural problems:
None	9/68	1
Yes	1/17	1.00 (0.19 to 5.20)	1.00
Total	10/85	—