Table 4 Univariate analysis (unadjusted results) of drug counts by socio-economic position variables

Number of drugs/person

Rate ratio (95% CI)

p-value

Mother’s education

O level or lower

1107/69 = 16.0

1.00

p = 0.4

A level or degree

195/14 = 13.9

0.87 (0.64, 1.18)

Father’s education

O level or lower

902/53 = 17.0

1.00

p = 0.04

A level or degree

400/30 = 13.3

0.78 (0.62, 0.99)

Family social class

I, II, III non-manual

506/33 = 15.3

1.00

p = 0.8

III manual, IV V

796/50 = 15.9

1.04 (0.82, 1.32)

Housing tenure (in pregnancy)

Owned/mortgaged

1096/69 = 15.9

1.00

p = 0.3

Other

206/14 = 14.7

0.93 (0.68, 1.26)

Family adversity index

0

498/31 = 16.1

1.00

p = 0.6

1

404/25 = 16.2

} 0.97 (0.88, 1.09)

2

199/14 = 14.2

≥3

201/13 = 15.5

Townsend score (quintile)

1^st (least deprived)

404/25 = 16.2

1.00

p = 0.9

2

250/18 = 13.9

} 1.00 (0.95, 1.04)²

3

309/18 = 17.2

4 & 5^th (most deprived)¹

339/22 = 15.4

Drug counts age 10-18

Number of drugs/person

Rate ratio

p-value

Mother’s education

O level or lower

758/95 = 8.0

1.00

p = 1.0

A level or degree

410/51 = 8.0

1.01 (0.79, 1.28)

Father’s education

O level or lower

634/75 = 8.5

1.00

p = 0.3

A level or degree

534/71 = 7.5

0.89 (0.71, 1.12)

Family social class

I, II, III non-manual

601/80 = 7.5

1.00

p = 0.3

III manual, IV V

567/66 = 8.6

1.14 (0.91, 1.44)

Housing tenure

Mortgaged/owned

922/113 =8.2

1.00

p = 0.5

Other

246/33 = 7.5

0.91 (0.69, 1.21)

Family adversity index

0

452/63 = 7.2

1.00

p = 0.2

1

430/49 = 8.8

} 1.07 (0.96, 1.21)

2

151/19 = 7.9

≥3

135/15 = 9.0

Townsend score (quintile)

1^st (least deprived)

414/54 = 7.7

1.00

p = 0.6

2

152/23 = 6.6

} 1.01 (0.97, 1.05)²

3

335/36 = 9.3

4

176/22 = 8.0

5^th (most deprived)

91/11 = 8.3