Table 2

Associations between socioeconomic factors and risk for brain tumours in women

GliomaMeningiomaAcoustic neuroma
Mean age (years) (SD)61.83 (10.5)63.0 (11.8)58.82 (10.65)
Total number of cases26114705415
Socioeconomic indicatorNumberIRR* (95% CI)IRR† (95% CI)NumberIRR* (95% CI)IRR† (95% CI)NumberIRR* (95% CI)IRR† (95% CI)
Education
 Primary9931.01.016341.01.01361.01.0
 Secondary low8320.98 (0.90 to 1.08)0.99 (0.90 to 1.09)12670.98 (0.90 to 1.06)0.99 (0.91 to 1.07)1451.19 (0.93 to 1.52)1.19 (0.93 to 1.530
 Secondary high1781.16 (0.98 to 1.37)1.17 (0.99 to 1.38)2230.94 (0.81 to 1.08)0.95 (0.83 to 1.10)361.61 (1.10 to 2.36)1.62 (1.10 to 2.38)
 University low2320.91 (0.79 to 1.06)0.92 (0.79 to 1.07)4221.08 (0.96 to 1.21)1.11 (0.99 to 1.24)481.29 (0.91 to 1.82)1.30 (0.91 to 1.85)
 University high3761.21 (1.07 to 1.37)1.23 (1.08 to 1.40)5291.11 (1.00 to 1.24)1.16 (1.04 to 1.29)501.13 (0.80 to 1.58)1.14 (0.80 to 1.610
Income
 Quintile 15191.01.08631.01.0811.01.0
 Quintile 25571.02 (0.91 to 1.15)1.03 (0.91 to 1.16)9471.05 (0.96 to 1.15)1.04 (0.95 to 1.14)690.80 (0.58 to 1.11)0.81 (0.60 to 1.13)
 Quintile 35430.99 (0.88 to 1.12)0.99 (0.88 to 1.12)8230.97 (0.88 to 1.06)0.95 (0.86 to 1.05)1051.14 (0.85 to 1.53)1.14 (0.84 to 1.53)
 Quintile 45241.01 (0.89 to 1.15)1.00 (0.88 to 1.14)7740.98 (0.89 to 1.09)0.96 (0.86 to 1.06)810.87 (0.64 to 1.20)0.86 (0.62 to 1.20)
 Quintile 54681.00 (0.88 to 1.14)0.96 (0.84 to 1.10)6680.94 (0.84 to 1.05)0.90 (0.80 to 1.00)790.97 (0.70 to 1.34)0.93 (0.66 to 1.30)
SEI based on occupation‡
 Low manual7821.01.011941.01.01421.01.0
 High manual1931.01 (0.86 to 1.19)1.02 (0.87 to 1.20)2860.97 (0.85 to 1.10) 0.98 (0.86 to 1.11)260.70 (0.46 to 1.07)0.71 (0.46 to 1.08)
 Low non-manual5791.13 (1.02 to 1.27)1.16 (1.04 to 1.29)8021.01 (0.92 to 1.11)1.03 (0.94 to 1.13)840.92 (0.70 to 1.20)0.92 (0.70 to 1.21)
 Intermediate non-manual4471.13 (1.00 to 1.27)1.16 (1.03 to 1.31)6861.11 (1.01 to 1.22)1.14 (1.04 to 1.26)771.03 (0.78 to 1.37)1.04 (0.77 to 1.38)
 Self-employed961.12 (0.91 to 1.40)1.13 (0.91,1.39)1411.06 (0.90 to 1.27)1.07 (0.90 to 1.28)100.64 (0.33 to 1.21)0.62 (0.32 to 1.17)
 High non-manual2131.20 (1.03 to 1.40)1.26 (1.07 to 1.48)2961.07 (0.94 to 1.22)1.13 (0.99 to 1.29)300.94 (0.63 to 1.40)0.95 (0.63 to 1.44)
 Farmers320.71 (0.50 to 1.01)0.70 (0.49 to 0.99)630.90 (0.70 to 1.16)0.89 (0.69 to 1.16)50.64 (0.26 to 1.56)0.59 (0.24 to 1.44)
Marital status
 Married/cohabiting1,161.01.023321.01.02751.01.0
 Previously married8130.95 (0.87 to 1.04)0.95 (0.87 to 1.04)14291.04 (0.97 to 1.11)1.04 (0.97 to 1.12)1110.87 (0.70 to 1.10)0.88 (0.70 to 1.10)
 Never married1820.91 (0.78 to 1.06)0.90 (0.77 to 1.05)3141.04 (0.92 to 1.17)1.04 (0.92 to 1.17)290.89 (0.61 to 1.31)0.89 (0.61 to 1.31)
  • *Adjusted for age at diagnosis (modelled as age and age3), time period and region.

  • †Analyses of education and SEI additionally adjusted for marital status and income, analyses of income additionally adjusted for marital status and education. Analysis of marital status additionally adjusted for education and income.

  • ‡Total number is smaller than in the other analyses because of the restriction to the working population.

  • IRR, incidence rate ratio; SEI, Swedish Socioeconomic Classification.