Table 3.

Additive binomial regression estimates of the contribution of parents' region of birth and mother's ethnic status on neonatal seroprevalence for HTLV. Central estimates are the average, and confidence limits the most extreme, of those obtained including or excluding indeterminate results as seropositive

	Prevalence per 1000 births (95% CI)	χ2 (df)	P value
Baseline population*	0.098 (0.017 to 0.20)
Mother's region of birth:
Caribbean	12.1 (7.5 to 17.7)	42.6 (2)	<0.0001
Other endemic	2.3 (0.9 to 3.0)
Non-endemic (reference)	0
Father's region of birth:
Caribbean	5.4 (2.8 to 8.7)	14.9 (3)	0.0019
Other endemic	0.1 (−0.3 to 0.3)
Not registered	0.3 (−0.2 to 0.8)
Non-endemic (reference)	0
Mother's ethnic status:
Black Caribbean	3.6 (2.2 to 7.3)	23.0 (3)	<0.0001
Black African	−0.1 (−0.2 to 0.9)
Not known	0.06 (−0.1 to 0.2)
Not black (reference)	0

^*Parents born non-endemic region, mother not black.