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. 2015 Oct 6;39(5):441–445. doi: 10.1111/1753-6405.12444

Table 2.

Proportion (%) of current oral contraceptive users (National Health Survey 2001) and duration of use among ever users (AOCS controls)

Duration of use Age groups (years)
<25 25–29 30–34 35–39 40–44 45–49 50–54 55–59 60–64 65–69 70+ Total
Current usea 43.2 40.4 29.4 22.2 14.5 7.9 - - - - - 26.9
Duration of useb
Never 33.3 12.5 11.6 10.1 6.9 12.9 11.4 15.5 25.5 37.2 63.1 24.8
1–5 yrs 66.7 41.7 25.6 21.7 21.6 22.1 30.5 32.6 25.5 28.7 15.1 26.0
6–10 yrs 0.0 33.3 30.2 14.5 25.0 26.4 24.3 26.4 22.9 17.1 10.7 21.4
11–15 yrs 0.0 12.5 25.6 30.4 19.0 13.5 14.3 14.6 14.3 8.5 6.7 13.7
16–20 yrs 0.0 0.0 7.0 23.2 23.3 11.0 9.5 7.5 4.3 4.9 3.6 8.5
21–25 yrs 0.0 0.0 0.0 0.0 4.3 9.8 6.7 1.3 4.8 2.4 0.9 3.7
26–30 yrs 0.0 0.0 0.0 0.0 0.0 4.3 3.3 2.1 1.7 0.6 0.0 1.6
>30 yrs 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 0.6 0.0 0.2

a: 2001 National Health Survey, Australian Bureau of Statistics8

b: Australian Ovarian Cancer Study Controls12