Table 6 Univariate and Multivariate analysis describing the association between socio-economic factors and infant formula feeding at 1^st visit (n = 2145)

Age in years

> 34

340

183 (54)

1

1

30–34

647

321 (50)

0.85 (0.65,1.10)

0.21

0.84 (0.60,1.17)

0.30

25–29

524

319 (61)

1.34 (1.01,1.76)

0.04

1.06 (0.75,1.50)

0.73

20–24

312

244 (78)

3.08 (2.18,4.34)

<0.001

1.83 (1.20,2.82)

<0.01

<20

179

158 (88)

6.46 (3.91,10.67)

<0.001

6.24 (2.84,13.67)

<0.001

Not Known

143

Mother Smoker

No

1167

615 (53)

1

1

Yes

593

482 (81)

3.89 (3.07,4.93)

<0.001

2.44 (1.84,3.22)

<0.001

Not Known

385

Mother employed

Yes

1035

542 (52)

1

1

No

649

467 (72)

2.33 (1.89,2.88)

<0.001

1.39 (1.08,1.78)

<0.01

Not Known

461

DEPCAT **

1

193

55 (29)

1

1

2

165

66 (40)

1.67 (1.08,2.60)

0.02

0.90 (0.51,1.58)

0.71

3

222

124 (56)

3.18 (2.11,4.78)

<0.001

2.81 (1.69,4.69)

<0.001

4

218

108 (50)

2.46 (1.64,3.71)

<0.001

1.82 (1.10,3.02)

0.02

5

254

159 (63)

4.20 (2.81,6.28)

<0.001

3.02 (1.82,5.03)

<0.001

6

462

288 (62)

4.15 (2.88,5.98)

<0.001

2.38 (1.50,3.78)

<0.001

7

600

490 (82)

11.18 (7.68,16.26)

<0.001

5.49 (3.42,8.84)

<0.001

Not Known

31