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Table 1 Number of cases, incidence rates and hazard ratios (HRs) for mental disorder diagnostic categories by parental income quintile during birth year

From: Parental income as a marker for socioeconomic position during childhood and later risk of developing a secondary care-diagnosed mental disorder examined across the full diagnostic spectrum: a national cohort study

  n Incidence rate Basic adjustmenta Additional adjustmentb
Any mental disorder
 Q1 30,626 1512 2.09 (2.05, 2.13) 1.52 (1.49, 1.55)
 Q2 23,328 1108 1.53 (1.50, 1.56) 1.33 (1.30, 1.36)
 Q3 19,853 929 1.28 (1.25, 1.31) 1.20 (1.17, 1.22)
 Q4 17,813 826 1.14 (1.11, 1.16) 1.10 (1.08, 1.13)
 Q5 15,774 726 1.00 (Ref.) 1.00 (Ref.)
Substance misuse disorder
 Q1 6480 284 3.44 (3.27, 3.62) 1.95 (1.85, 2.07)
 Q2 4008 174 2.10 (1.99, 2.22) 1.63 (1.54, 1.72)
 Q3 3096 134 1.62 (1.53, 1.72) 1.43 (1.35, 1.52)
 Q4 2479 107 1.29 (1.22, 1.37) 1.22 (1.15, 1.30)
 Q5 1917 83 1.00 (Ref.) 1.00 (Ref.)
Personality disorders
 Q1 7858 347 2.76 (2.64, 2.88) 1.78 (1.70, 1.87)
 Q2 5317 232 1.85 (1.76, 1.93) 1.53 (1.46, 1.60)
 Q3 4201 183 1.45 (1.38, 1.52) 1.33 (1.26, 1.39)
 Q4 3735 163 1.29 (1.23, 1.36) 1.24 (1.18, 1.30)
 Q5 2889 126 1.00 (Ref.) 1.00 (Ref.)
Broadly defined schizophrenia
 Q1 4715 206 2.38 (2.25, 2.50) 1.74 (1.64, 1.84)
 Q2 2937 127 1.47 (1.39, 1.55) 1.34 (1.26, 1.42)
 Q3 2427 105 1.21 (1.14, 1.28) 1.19 (1.12, 1.26)
 Q4 2151 93 1.07 (1.01, 1.14) 1.08 (1.01, 1.15)
 Q5 2002 87 1.00 (Ref.) 1.00 (Ref.)
Mood disorders
 Q1 10,482 465 1.72 (1.67, 1.78) 1.32 (1.27, 1.36)
 Q2 8497 374 1.38 (1.34, 1.43) 1.23 (1.19, 1.28)
 Q3 7256 318 1.18 (1.14, 1.22) 1.12 (1.08, 1.16)
 Q4 6629 291 1.08 (1.04, 1.11) 1.05 (1.01, 1.09)
 Q5 6151 270 1.00 (Ref.) 1.00 (Ref.)
Anxiety/somatoform disorders
 Q1 18,683 854 2.11 (2.06, 2.17) 1.50 (1.46, 1.54)
 Q2 14,109 634 1.57 (1.52, 1.60) 1.36 (1.32, 1.40)
 Q3 11,938 533 1.31 (1.28, 1.35) 1.23 (1.20, 1.27)
 Q4 10,776 480 1.18 (1.15, 1.22) 1.15 (1.12, 1.18)
 Q5 9130 406 1.00 (Ref.) 1.00 (Ref.)
Eating disorders
 Q1 2143 93 0.90 (0.85, 0.96) 0.88 (0.82, 0.93)
 Q2 1909 83 0.80 (0.75, 0.85) 0.83 (0.78, 0.89)
 Q3 2096 91 0.88 (0.83, 0.93) 0.92 (0.87, 0.98)
 Q4 2045 89 0.86 (0.81, 0.92) 0.89 (0.84, 0.94)
 Q5 2355 102 1.00 (Ref.) 1.00 (Ref.)
  1. Q = quintile. The reference group is quintile 5 (HR = 1). Incidence rate is reported per 100,000 person years
  2. aBasic adjustment—hazard ratios adjusted for gender, birth year and calendar time
  3. bAdditional adjustment—hazard ratios adjusted for gender, birth year, calendar time, parental mental disorders, parental educational attainment level, degree of urbanicity at birth and number of changes in child-parental separation status between birth and 15th birthday