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Table 2 Univariate and multivariable analysis of baseline factors associated with retention in the trial (row percentages) [missing values]

From: Recruitment and retention strategies and the examination of attrition bias in a randomised controlled trial in children’s centres serving families in disadvantaged areas of England

Characteristics [n]

Retainedn(%)

Lost to follow-upn(%)

Univariate odds ratio (95% CI)

Adjusted odds ratio (95% CI)Model with factors significant atp ≤ 0.02 on univariate analysis

Adjusted odds ratio (95% CI)Final model

Youngest child aged: [25]

     

0-1 years

333 (69)

151 (31)

1.00

  

1-2 years

405 (67)

198 (33)

0.94 (0.72, 1.23)

  

Number of children in family: [41]

     

1

383 (71)

159 (29)

1.00

  

2

238 (68)

113 (32)

0.88 (0.65, 1.19)

0.93 (0.67, 1.29)

 

3

71 (59)

50 (41)

0.59 (0.39, 0.90)

0.68 (0.42, 1.11)

 

≥4

37 (65)

20 (35)

0.77 (0.43, 1.40)

0.86 (0.44, 1.68)

 

Mother aged: [52]

     

Over 25 years

595 (73)

217 (27)

1.00

  

16-25 years

131 (53)

117 (47)

0.41 (0.30, 0.56)

0.56 (0.39, 0.81)

0.57 (0.41, 0.78)

Lives in: [17]

     

House

616 (70)

265 (30)

1.00

  

Flat or other

126 (59)

88 (41)

0.62 (0.45, 0.86)

0.91 (0.62, 1.35)

 

Tenure: [25]

     

Owner occupied

368 (79)

96 (21)

1.00

  

Non-owner occupied

369 (59)

254 (41)

0.39 (0.30, 0.52)

0.65 (0.45, 0.93)

0.53 (0.38, 0.73)

Ethnic group: [50]

     

White British

685 (68)

323 (32)

1.00

  

Other

32 (59)

22 (41)

0.76 (0.41, 1.40)

  

English is first language: [12]

     

No

57 (59)

39 (41)

1.00

  

Yes

688 (69)

316 (31)

1.49 (0.95, 2.34)

1.42 (0.85, 2.36)

 

Single adult household: [43]

     

No

622 (71)

255 (29)

1.00

  

Yes

109 (57)

83 (43)

0.56 (0.40, 0.78)

0.78 (0.53, 1.13)

 

Any smoker in household: [30]

     

No

534 (70)

225 (30)

1.00

  

Yes

199 (62)

124 (38)

0.72 (0.54, 0.96)

0.90 (0.65, 1.24)

 

Household member drinks ≥6 drinks on one occasion: [110]

     

No

292 (70)

128 (30)

1.00

  

Yes

401 (68)

191 (32)

0.94 (0.71, 1.25)

  

IMD quintile: [4]

     

1 (2.4-15.6)

176 (79)

46 (21)

1.00

  

2 (15.7-25.7)

171 (75)

58 (25)

0.76 (0.48, 1.20)

0.82 (0.49, 1.36)

0.83 (0.51, 1.35)

3 (25.8-34.6)

147 (67)

71 (33)

0.55 (0.35, 0.86)

0.72 (0.43, 1.21)

0.66 (0.41, 1.07)

4 (34.7-46.6)

134 (61)

84 (39)

0.44 (0.28, 0.69)

0.54 (0.33, 0.90)

0.58 (0.35, 0.94)

5 (46.7-74.8)

123 (56)

98 (44)

0.35 (0.23, 0.56)

0.53 (0.31, 0.91)

0.50 (0.30, 0.82)

Had fire escape plan: [19]

     

No

436 (69)

196 (31)

0.90 (0.69, 1.17)

  

Yes

304 (66)

157 (34)