Table 1. Sexual identity, attraction and behaviours by age group among men and women aged 16–74 years.

	16–24		25–34		35–44		45–54		55–64		65–74		p-value (trend)	Total
Men
Denominators (unweighted, weighted)	1729	1238	1525	1374	806	1425	794	1413	772	1197	667	860		6293	7508
Sexual Identitya													0.012
Heterosexual/Straight	96.7%	[95.6–97.6]	96.5%	[95.3–97.3]	97.7%	[95.9–98.7]	96.7%	[95.1–97.7]	96.8%	[95.4–97.8]	99.0%	[97.8–99.6]		97.1%	[96.6–97.6]
Gay/Lesbian	1.5%	[1.0–2.3]	2.4%	[1.7–3.4]	1.3%	[0.7–2.6]	1.8%	[1.1–2.8]	1.3%	[0.7–2.1]	0.2%	[0.0–0.8]		1.5%	[1.2–1.9]
Bisexual	1.5%	[1.0–2.3]	0.7%	[0.4–1.2]	0.9%	[0.3–2.8]	1.2%	[0.7–2.3]	1.3%	[0.7–2.4]	0.5%	[0.2–1.4]		1.0%	[0.8–1.4]
Other	0.3%	[0.1–0.7]	0.5%	[0.2–1.0]	0.1%	[0.0–0.4]	0.3%	[0.1–1.8]	0.6%	[0.3–1.6]	0.3%	[0.0–2.0]		0.3%	[0.2–0.6]
Any same-sex attraction	7.0%	[5.8–8.5]	7.9%	[6.5–9.4]	4.7%	[3.4–6.5]	6.4%	[4.9–8.4]	8.2%	[6.4–10.5]	4.2%	[3.0–6.0]	0.187	6.5%	[5.8–7.2]
Same-sex experience but never with genital contactb	3.0%	[2.2–4.1]	1.9%	[1.3–2.9]	2.6%	[1.5–4.5]	2.0%	[1.2–3.4]	2.5%	[1.6–4.0]	2.1%	[1.2–3.7]	0.508	2.4%	[1.9–2.9]
Same-sex sex everb,c	4.0%	[3.1–5.2]	5.7%	[4.6–7.1]	4.7%	[3.3–6.6]	7.2%	[5.5–9.3]	7.3%	[5.6–9.5]	3.4%	[2.3–5.1]	0.131	5.5%	[4.9–6.2]
Opposite-sex sex everd	86.3%	[84.3–88.0]	95.6%	[94.1–96.7]	98.9%	[97.7–99.5]	98.5%	[97.4–99.1]	98.5%	[97.5–99.1]	98.7%	[97.4–99.3]	<0.001	96.1%	[95.5–96.5]
Same- and opposite-sex sexe	2.9%	[2.2–3.9]	4.2%	[3.2–5.4]	3.9%	[2.7–5.6]	6.4%	[4.8–8.4]	6.9%	[5.3–9.1]	3.2%	[2.1–4.9]	0.002	4.7%	[4.1–5.3]
Same-sex sex in the past 5 yearsd	2.9%	[2.1–3.9]	3.5%	[2.6–4.7]	2.3%	[1.4–3.7]	2.9%	[1.9–4.3]	2.3%	[1.3–3.8]	0.9%	[0.4–2.0]	0.003	2.6%	[2.1–3.0]
	16–24		25–34		35–44		45–54		55–64		65–74		p-value (trend)	Total
Women
Denominators (unweighted, weighted)	2140	1207	2487	1380	1215	1455	1123	1443	1030	1235	874	935		8869	7654
Sexual Identity													<0.001
Heterosexual/Straight	95.0%	[93.7–96.0]	96.6%	[95.8–97.2]	96.8%	[95.6–97.7]	97.4%	[96.3–98.2]	99.1%	[98.2–99.5]	99.4%	[98.6–99.7]		97.3%	[96.9–97.6]
Gay/Lesbian	0.9%	[0.5–1.4]	1.2%	[0.8–1.8]	1.5%	[0.9–2.4]	1.1%	[0.7–1.9]	0.8%	[0.4–1.7]	0.1%	[0.0–0.6]		1.0%	[0.8–1.2]
Bisexual	3.5%	[2.7–4.5]	2.0%	[1.5–2.7]	1.4%	[0.8–2.2]	1.0%	[0.5–1.9]	0.0%	0.00%	0.3%	[0.1–1.0]		1.4%	[1.2–1.7]
Other	0.7%	[0.3–1.4]	0.2%	[0.1–0.4]	0.3%	[0.1–0.8]	0.5%	[0.2–1.2]	0.1%	[0.0–0.5]	0.3%	[0.1–1.1]		0.3%	[0.2–0.5]
Any same-sex attraction	17.2%	[15.4–19.1]	17.2%	[15.6–18.9]	13.6%	[11.7–15.8]	9.6%	[7.9–11.6]	5.3%	[4.0–7.0]	3.4%	[2.3–5.0]	<0.001	11.5%	[10.7–12.2]
Same-sex experience but never with genital contactb	11.3%	[9.8–13.0]	9.3%	[7.9–10.8]	4.0%	[3.0–5.4]	2.2%	[1.5–3.2]	3.0%	[2.1–4.3]	1.4%	[0.8–2.6]	<0.001	5.3%	[4.8–5.8]
Same-sex sex everb,c	7.6%	[6.4–9.0]	8.8%	[7.7–10.1]	7.4%	[6.0–9.2]	6.6%	[5.3–8.3]	3.5%	[2.4–5.0]	0.8%	[0.4–1.4]	<0.001	6.1%	[5.6–6.7]
Opposite-sex sex everd	85.4%	[83.5–87.0]	98.2%	[97.5–98.8]	99.8%	[99.4–99.9]	99.5%	[99.0–99.7]	99.2%	[98.6–99.5]	99.3%	[98.7–99.7]	<0.001	97.0%	[96.7–97.4]
Same- and opposite-sex sexe	7.2%	[6.0–8.5]	8.6%	[7.4–9.9]	7.3%	[5.9–9.1]	6.4%	[5.1–8.1]	3.3%	[2.3–4.9]	0.7%	[0.3–1.3]	<0.001	5.9%	[5.4–6.5]
Same-sex sex in the past 5 yearsf	6.2%	[5.1–7.4]	4.7%	[3.9–5.6]	3.5%	[2.6–4.9]	2.7%	[1.9–3.8]	1.0%	[0.5–2.1]	0.1%	[0.0–0.5]	<0.001	3.2%	[2.8–3.6]

^a Estimates for sexual identity among women aged 16–24 years differ slightly from those published in Mercer et al. Lancet 2013;382:1781–94 due to error.

^b Those reporting same-sex experience with genital contact (ever) may also have reported same-sex experience without genital contact but are not included in the same-sex experience but never with genital contact group.

^c Same-sex experience with genital contact

^d Opposite-sex experience with genital contact

^e Same- and opposite-sex experience with genital contact

^f 1+ same-sex partner in the past 5 years