Table 2. Estimates of the force of infection based on constant and age-dependent catalytic models.

	Age-dependent force of infection			Constant force of infection
Age group (in yrs)	Estimate (95% CI)	CRS incidence per 100,000 live births (95% CI)	Akaike information criterion	Estimate (95% CI)	CRS incidence per 100,000 live births (95% CI)	Akaike information criterion
16–19	0.03036 (0.01833, 0.06157)	65.47 (41.60, 104.16)	40.00821	0.06915 (0.06630, 0.07230)	225.58 (217.49, 232.41)	176.8444
20–24	0.01515 (0.00866, 0.02910)
25–29	0.01901 (0.00892, 0.03838)
30–34	0.02208 (0.01104, 0.05588)
35–39	0.03621 (0.01996, 0.09598)