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. 2016 Nov 22;6(11):e012919. doi: 10.1136/bmjopen-2016-012919

Table 3.

Associations between co-occurrence index and sociodemographic circumstances at age 11 (n=11 399)

  Unadjusted relative risk ratio (95% CI)
Mutually adjusted relative risk ratio (95% CI)
0 1 2 3 4+ 0 1 2 3 4+
Prevalence (%) 22.1 35.2 25.2 11.8 5.7 22.1 35.2 25.2 11.8 5.7
Sex (ref: boys)
 Girls 1.06 (0.96 to 1.18) 1.00 0.88 (0.79 to 0.97) 0.78 (0.68 to 0.90) 0.56 (0.45 to 0.70) 1.06 (0.96 to 1.18) 1.00 0.88 (0.79 to 0.97) 0.78 (0.68 to 0.90) 0.56 (0.45 to 0.70)
Ethnicity (ref: white)
 Mixed 0.87 (0.60 to 1.27) 1.00 1.03 (0.94 to 1.82) 0.92 (0.58 to 1.47) 1.72 (1.06 to 2.82) 0.89 (0.61 to 1.29) 1.00 1.28 (0.92 to 1.78) 0.89 (0.56 to 1.42) 1.61 (0.99 to 2.63)
 Indian 0.93 (0.60 to 1.46) 1.00 0.92 (0.65 to 1.31) 0.94 (0.41 to 2.18) 0.57 (0.24 to 1.35) 0.91 (0.58 to 1.43) 1.00 0.91 (0.64 to 1.30) 0.92 (0.40 to 2.10) 0.54 (0.23 to 1.30)
 Pakistani 0.93 (0.60 to 1.17) 1.00 0.81 (0.65 to 1.02) 0.55 (0.38 to 0.80) 0.55 (0.34 to 0.90) 1.02 (0.80 to 1.30) 1.00 0.73 (0.57 to 0.94) 0.45 (0.30 to 0.68) 0.40 (0.25 to 0.67)
 Black 0.92 (0.71 to 1.19) 1.00 0.93 (0.68 to 1.27) 0.76 (0.41 to 1.42) 0.83 (0.50 to 1.39) 0.94 (0.72 to 1.22) 1.00 0.87 (0.64 to 1.20) 0.70 (0.37 to 1.30) 0.71 (0.41 to 1.20)
 Other 0.81 (0.52 to 1.27) 1.00 0.87 (0.47 to 1.61) 0.59 (0.27 to 1.27) 0.22 (0.09 to 0.54) 0.82 (0.52 to 1.27) 1.00 0.85 (0.46 to 1.56) 0.54 (0.25 to 1.19) 0.20 (0.09 to 0.46)
Mat. Ed. (ref: higher/degree)
 Diploma 0.98 (0.82 to 1.17) 1.00 1.22 (1.04 to 1.57) 0.85 (0.67 to 1.08) 1.40 (0.96 to 2.17) 0.98 (0.82 to 1.17) 1.00 1.16 (1.02 to 1.53) 0.81 (0.63 to 1.03) 1.26 (0.90 to 1.76)
 A-levels 1.03 (0.86 to 1.25) 1.00 1.13 (0.87 to 1.30) 1.02 (0.77 to 1.33) 1.42 (0.98 to 2.11) 1.02 (0.84 to 1.23) 1.00 1.05 (0.85 to 1.29) 0.95 (0.70 to 1.27) 1.30 (0.86 to 1.92)
 GCSEs 0.85 (0.75 to 1.00) 1.00 1.24 (1.07 to 1.42) 1.41 (1.19 to 1.68) 1.64 (1.20 to 1.68) 0.88 (0.75 to 1.02) 1.00 1.07 (0.92 to 1.26) 1.22 (0.99 to 1.52) 1.23 (0.88 to 1.70)
 None 0.87 (0.71 to 1.06) 1.00 1.22 (0.99 to 1.50) 1.41 (1.10 to 1.82) 1.98 (1.39 to 2.80) 0.97 (0.78 to 1.22) 1.00 1.06 (0.83 to 1.34) 1.22 (0.90 to 1.63) 1.38 (0.98 to 2.08)
Income (ref: Q1 (high))
 Q2 1.12 (0.95 to 1.32) 1.00 1.08 (0.92 to 1.27) 1.09 (0.88 to 1.36) 1.02 (0.73 to 1.45) 1.16 (0.98 to 1.38) 1.00 1.05 (0.89 to 1.24) 1.01 (0.83 to 1.32) 0.92 (0.63 to 1.34)
 Q3 1.08 (0.93 to 1.27) 1.00 1.26 (1.06 to 1.50) 1.37 (1.13 to 1.67) 1.48 (1.10 to 2.00) 1.16 (0.97 to 1.38) 1.00 1.21 (1.00 to 1.46) 1.22 (1.02 to 1.63) 1.36 (0.96 to 1.94)
 Q4 0.88 (0.72 to 1.06) 1.00 1.31 (1.09 to 1.57) 1.40 (1.12 to 1.77) 1.77 (1.29 to 2.42) 0.93 (0.76 to 1.15) 1.00 1.23 (1.00 to 1.52) 1.21 (0.93 to 1.59) 1.56 (1.07 to 2.28)
 Q5 (low) 0.86 (0.71 to 1.05) 1.00 1.30 (1.07 to 1.57) 1.53 (1.24 to 1.89) 1.91 (1.40 to 2.61) 0.90 (0.71 to 1.54) 1.00 1.23 (0.97 to 1.55) 1.34 (1.01 to 1.77) 1.72 (1.14 to 2.60)

Mutually adjusted model: adjusted for all other covariates; bold indicates significant result.

GCSE: General Certificate of Secondary Education.