Table 3.

Backward stepwise multi-level Poisson regression for factors associated with partial immunization at 1, 2 and 5 years of age by ethnic group

	1 year		2 years		5 years
	ARR (95% CI)		ARR (95% CI)		ARR (95% CI)
	White British (%)	Pakistani (%)	White British (%)	Pakistani (%)	White British (%)	Pakistani (%)
Smoking during pregnancy
No	NS	NS	1.00	NS	1.00	NS
Yes			1.25 (1.05–1.50)		1.22 (1.04–1.43)
In receipt of means-tested benefits
No	NS	NS	NS	NS	NS	1.00
Yes						1.25 (1.03–1.51)
Single parent
No	1.00	1.00	NS	1.00	NS	1.00
Yes	1.41 (1.05–1.89)	1.99 (1.24–3.17)		1.71 (1.21–2.42)		1.56 (1.13–2.14)
No. children in household
0	1.00	1.00	1.00	1.00	1.00	1.00
1	1.58 (1.04–2.12)	1.01 (0.54–1.61)	1.35 (1.10–1.65)	1.06 (0.76–1.47)	1.26 (1.05–1.50)	0.97 (0.72–1.29)
2–3	2.43 (1.45–3.01)	1.21 (0.80–1.83)	1.96 (1.58–2.43)	1.34 (1.00–1.80)	1.86 (1.54–2.24)	1.17 (0.90–1.52)
4	5.87 (2.90–9.92)	1.76 (1.06–2.92)	3.34 (2.06–5.41)	1.77 (1.23–2.54)	2.80 (1.74–4.50)	1.42 (1.02–1.98)
UK born
No	NS	0.70 (0.52–0.94)	1.65 (1.06–2.57)	0.77 (0.63–0.95)	1.55 (1.02–2.36)	0.80 (0.67–0.97)
Yes		1.00	1.00	1.00	1.00	1.00

Values are adjusted risk ratios (ARRs) with 95% confidence intervals (95% CI). Fully immunized is the baseline.