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Table 2 Age-adjusted odds ratios (aORs) for heterosexual inexperience and socioeconomic and regional factors among Japanese women and men aged 18 to 24 years and 25 to 39 years in 2010

From: Trends in heterosexual inexperience among young adults in Japan: analysis of national surveys, 1987–2015

  18–24 years 25–39 years
  Women Men Women Men
  aOR (95% CI)a aOR (95% CI)a aOR (95% CI)a aOR (95% CI)a
Educationb c
 High school or less Ref Ref
 Vocational school or short college 1.10 (0.88 to 1.38) 0.86 (0.68 to 1.08)
 Undergraduate studies 1.60 (1.26 to 2.02) 0.69 (0.57 to 0.84)
 Graduate studies 2.40 (1.39 to 4.14) 0.77 (0.53 to 1.11)
 p    < 0.001 0.001
Occupational Status
 Regular employee Ref Ref Ref Ref
 Part-time or temporary worker 1.19 (0.90 to 1.57) 1.55 (1.09 to 2.20) 0.86 (0.69 to 1.07) 3.82 (3.04 to 4.80)
 Business owner or family business 0.85 (0.30 to 2.41) 1.17 (0.52 to 2.63) 0.61 (0.36 to 1.05) 0.94 (0.64 to 1.36)
 Unemployed 0.68 (0.47 to 0.99) 3.21 (2.07 to 4.99) 0.36 (0.27 to 0.47) 7.87 (6.06 to 10.23)
 Student 1.58 (1.22 to 2.05) 1.90 (1.49 to 2.42) 1.19 (0.43 to 3.29) 4.76 (2.51 to 9.03)
 p 0.014 < 0.001 < 0.001 < 0.001
Annual Income (in JPY 10,000s)
 0–99 Ref Ref Ref Ref
 100–299 0.78 (0.62 to 0.98) 0.56 (0.44 to 0.72) 2.19 (1.76 to 2.72) 0.49 (0.39 to 0.60)
 300–499d 0.92 (0.57 to 1.50) 0.35 (0.23 to 0.51) 1.86 (1.42 to 2.43) 0.20 (0.16 to 0.25)
 500–799e 1.95 (1.05 to 3.59) 0.09 (0.06 to 0.13)
  ≥ 800 0.05 (0.01 to 0.19)
  0.114 < 0.001 < 0.001 < 0.001
Region of Residence
 Kanto Ref Ref Ref Ref
 Chubu 0.70 (0.54 to 0.91) 0.91 (0.69 to 1.20) 1.00 (0.77 to 1.29) 0.84 (0.67 to 1.07)
 Kinki 0.90 (0.67 to 1.21) 0.63 (0.47 to 0.87) 1.41 (1.08 to 1.83) 1.15 (0.90 to 1.47)
 Kyushu/Okinawa 0.68 (0.50 to 0.94) 0.60 (0.43 to 0.82) 0.69 (0.49 to 0.98) 0.61 (0.45 to 0.83)
 Chugoku/Shikoku 0.99 (0.68 to 1.43) 0.71 (0.49 to 1.05) 0.91 (0.64 to 1.29) 0.75 (0.55 to 1.04)
 Tohoku 0.68 (0.46 to 0.99) 0.69 (0.46 to 1.05) 0.86 (0.58 to 1.27) 1.00 (0.73 to 1.38)
 Hokkaido 0.93 (0.56 to 1.55) 0.63 (0.36 to 1.11) 0.67 (0.37 to 1.21) 0.37 (0.19 to 0.71)
 p 0.209 0.001 0.091 0.011
Population Density and Size of Residence
 Non-densely inhabited area Ref Ref Ref Ref
  < 200,000 1.05 (0.81 to 1.35) 1.04 (0.79 to 1.37) 0.97 (0.75 to 1.24) 0.89 (0.71 to 1.11)
 200,000 to < 1,000,000 0.77 (0.60 to 1.00) 0.97 (0.74 to 1.25) 0.95 (0.75 to 1.20) 1.03 (0.83 to 1.28)
  ≥ 1,000,000 0.94 (0.73 to 1.22) 1.01 (0.77 to 1.33) 0.81 (0.62 to 1.06) 0.74 (0.58 to 0.95)
 p 0.257 0.928 0.144 0.093
  1. aAdjusted for age as a continuous variable. Heterosexual inexperience was coded as 0 = has experience; 1 = has no experience
  2. bCurrently enrolled students were categorized according to their ongoing education
  3. cEducation was not analyzed in 18–24 year-old women and men because most adults in younger age groups may not have concluded their studies
  4. d≥ JPY 300 for 18–24-year-olds
  5. e≥ JPY 500 for 25–39-year old women
  6. aOR age-adjusted odds ratio, JPY Japanese Yen