Table 4

Impact of wish for protection against sexually transmitted infections on choice of contraceptive method in the three survey years, by sex and whether have a regular partner.

1982

1996

2001

Protection from STIs

N (%)

95% CI

N (%)

95% CI

N (%)

95% CI

Trend*

Regular partner

Boys:

Impact on the chosen strategy

2 (7)

(0–5)

10 (32)

(5–15)

8 (27)

(3–13)

No impact on the chosen strategy

28 (93)

(25–30)

21 (68)

(16–26)

22 (73)

(17–27)

Sexually experienced boys (total)

30 (100)

31 (100)

30 (100)

χ² = 6.40 p = 0.041

Girls:

Impact on the chosen strategy

5 (4)

(1–9)

27 (27)

(18–36)

20 (21)

(12–28)

No impact on the chosen strategy

120 (96)

(116–124)

74 (73)

(65–83)

76 (79)

(68–84)

Sexually experienced girls (total)

125 (100)

101 (100)

96 (100)

χ² = 23.53 p < 0.0001

No regular partner

Boys:

Impact on the chosen strategy

8 (21)

(3–13)

23 (72)

(18–28)

23 (51)

(16–30)

No impact on the chosen strategy

30 (79)

(25–35)

9 (28)

(4–14)

22 (49)

(15–29)

Sexually experienced boys (total)

38 (100)

32 (100)

45 (100)

χ² = 18.53 p < 0.0001

Girls:

Impact on the chosen strategy

6 (10)

(1–11)

55 (71)

(47–63)

37 (39)

(28–46)

No impact on the chosen strategy

56 (90)

(51–61)

23 (29)

(15–31)

59 (61)

(50–68)

Sexually experienced girls (total)

62 (100)

78 (100)

96 (100)

χ² = 53.24 p < 0.0001

* χ² tested for trend

Kangas et al. Population Health Metrics 2004 2:5   doi:10.1186/1478-7954-2-5