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Table 5 Results of final linear mixed models of socio-demographics by mental health problems

From: Mental health problems in a regional population of Australian adolescents: association with socio-demographic characteristics

   Outcome   
  Total SDQ (0–40) Internalising (0–20) Externalising (0–20) Prosocial (0–10)
  Mean difference (95 % CI) Mean difference (95 % CI) Mean difference (95 % CI) Mean difference (95 % CI)
Gender p < 0.0001 p < 0.0001 p < 0.0001 p < 0.0001
 Female 0.95 (−0.09 to1.98) 1.51 (0.92 to 2.10) −0.39 (−0.58 to −0.19) 0.93 (0.83 to 1.02)
 Male
Age p < .01 p < .001 n.s. n.s.
 12 0.45 (−0.48 to 1.38) −0.05 (−0.58 to 0.48)   
 13 0.10 (−0.66 to 0.86) −0.06 (−0.50 to 0.37)   
 14 0.04 (−0.73 to 0.82) −0.25 (−0.69 to 0.19)   
 15 −0.15 (−0.94 to 0.65) −0.29 (−0.74 to 0.16)   
 16   
Age × gender p < .0001 p < .0001 n.s. n.s.
 12 × female −1.31 (−2.64 to −0.02) −0.85 (−1.60 to −0.10)   
  Female 0.36 (1.25 to 0.53) 0.66 (0.16 to 1.16)   
 13 × female −0.65 (−1.79 to 0.48) −0.73 (−1.37 to −0.08)   
  Female 0.29 (0.27 to 0.86) 0.78 (0.46 to 1.10)   
 14 × female 0.22 (−0.94 to 1.37) −0.01 (−0.66 to 0.65)   
  Female 1.16 (0.57 to 1.76) 1.50 (1.16 to 1.84)   
 15 × female 1.33 (0.14 to 2.52) 0.68 (0.01 to 1.35)   
  Female 2.28 (1.62 to 2.94) 2.19 (1.82 to 2.57)   
 16 × Female   
  Female 0.95 (0.04 to 1.93) 1.51 (0.95–2.07)   
Aboriginality p < 0.0001 p < 0.0001 p < 0.0001 p < 0.001
 Aboriginal and/or Torres Strait Islander 2.02 (1.49 to 2.55) 0.70 (0.40 to 1.00) 1.33 (1.01 to 1.66) −0.27 (−0.43 to −0.12)
 Non-Aboriginal
  1. For all analyses in table a statistical significance level of p ≤ 0.05 was assumed. Non-significant associations are indicated in the table using n.s. For n relating to all subscales please refer to Table 4