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Table 5 Complete case analysis for variables used in the final modelb

From: Understanding pathways to social inequalities in childhood unintentional injuries: findings from the UK millennium cohort study

Variables

Complete Case (n = 10,210)b

Univariablea

Multivariable

RR

95% LCI

95% UCI

RR

95% LCI

95% UCI

Household Income Quintiles

 First (refer: highest)

Ref

Ref

 Second

1.12

0.99

1.25

1.08

0.96

1.22

 Third

1.19

1.7

1.33

1.11

0.98

1.26

 Fourth

1.22

1.08

1.38

1.09

0.95

1.26

 Fifth (Lowest)

1.28

1.13

1.44

1.15

0.996

1.34

Baseline Risk Factors

 Child’s sex (Ref: female)

1.23

1.14

1.33

1.22

1.13

1.32

 Child ethnic group (Ref: White)

0.78

0.68

0.9

0.79

0.68

0.91

Maternal age at MCS birth

 35+ years

Ref

Ref

 25–34 years

1.07

0.92

1.24

1.07

0.92

1.25

 20–24 years

0.92

0.82

1.05

0.95

0.82

1.11

 14–19 years

0.76

0.54

1.06

0.77

0.55

1.09

Number of children in the household at birth (including MCS child)

 MCS lone child

Ref

Ref

 2/3 children

1.11

1.02

1.2

1.1

1.01

1.2

 4 or more children

1.25

1.08

1.43

1.22

1.04

1.44

Factors That May Influence Environmental Safety

 Safe areas to play at home at 9 months (Ref: No safe areas)

1.06

0.98

1.14

1

0.92

1.08

Items of named safety equipment used at 9 months

 None

Ref

Ref

 1 piece

1.11

0.76

1.61

1.15

0.79

1.66

 2 pieces

1.18

0.84

1.66

1.25

0.9

1.74

 3 pieces

1.28

0.92

1.79

1.36

0.98

1.89

 4 pieces

1.28

0.91

1.79

1.36

0.98

1.9

 5 pieces

1.27

0.90

1.8

1.36

0.97

1.92

 Access to a garden at 9 months (Ref: No access)

Type of childcare used at 3 yrs. old

 None (parents look after child)

Ref

Ref

 Registered childcare provider

0.94

0.85

1.04

0.99

0.89

1.1

 Non-registered childcare provider (e.g. family, friends)

0.91

0.81

1.02

1.03

0.91

1.17

 Household pets at 3 yrs. old (ref: No pets)

1.09

1.02

1.17

1.04

0.97

1.12

 Household smoking at 3 yrs. old (ref: None)

1.14

1.03

1.26

1.01

0.9

1.13

 Poor home safety (HOME score) at 3 yrs. old

 Responder feels unsafe in area at 3 yrs. old

1.17

1.06

1.29

1.08

0.98

1.19

Disorganised home environment at age 3 years

 Very organised

Ref

Ref

 Organised

1.08

0.98

1.19

1.05

0.95

1.15

 Average

1.19

1.05

1.36

1.11

0.98

1.27

 Disorganised

1.18

1.03

1.35

1.06

0.92

1.22

 Very disorganised

1.55

1.25

1.93

1.35

1.09

1.67

Factors That May Influence Supervision

 Maternal distress measured MCSc age 3 (Ref: Kessler < 5)

1.36

1.09

1.68

1.18

0.94

1.47

 Limiting long term condition MCSc age 3 (Ref: none)

1.12

1.02

1.24

1.08

0.98

1.19

Alcohol units per week MCSc age 3

 None

 1–6 units

 7–14 units

 15 or more unitsc

 Approach to parenting MCSc age 3 (Ref: Unstructured)

Family and friends live nearby, MCSc age 3 (Ref: both)

 Both

 Family only

 Friends only

 Neither nearby

Factors Relating To The Mcs Child’s Abilities And Behaviours

 Strength and Difficulties Questionnaire (SDQ), MCSc age 3

  Average

Ref

Ref

  Borderline

1.12

0.99

1.26

1.05

0.93

1.19

  Below average

1.3

1.16

1.46

1.16

1.03

1.32

  Sight concerns, MCSc age 3

  Hearing concerns, MCSc age 3

  Child is NOT school ready, MCSc age 3

0.85

0.76

0.94

1.06

0.96

1.18

  1. awhen P < 0.1 (if rounded 1 d.p.) variables were included in the complete case, multivariable analysis
  2. b Using sample comprising complete cases for all variables in final multivariable analysis
  3. c 15 or more units is in excess of UK Guidance for all adults