Table 2.

Sexual partner numbers in the lifetime, past 5 years, and past year reported by men who have sex exclusively with women (MSEW), all men who have sex with men (MSM), and MSM who identified as gay in Natsal-3

	All sexual partners (regardless of gender), reported by:			Male sexual partners, reported by:			Female sexual partners, reported by:
	MSEW	All MSM	MSM who identified as gayb	MSEW	All MSM	MSM who identified as gayb	MSEW	All MSM	MSM who identified as gayb
Denominators a :	5069, 6257	190, 191	107, 99	5069, 6257	190, 191	107, 99	5069, 6257	190, 191	107, 99
Timeframe:
Lifetime
Age standardised:
% [95 % CI]
0	0	0	0	97.5 [97.0–98.0]	0	0	0	30.1 [23–38.3]	55.4 [42.7–67.4]
1	13.7 [12.6–14.9]	1.8 [0.7–4.5]	1.3 [0.3–5.3]	1.4 [1.1–1.9]	14.6 [9.3–22.2]	3.1 [0.8–10.7]	13.7 [12.6–14.9]	13.7 [9.0–20.3]	22.1 [13.6–33.8]
2	8.4 [7.5–9.3]	1.8 [0.9–3.8]	1.5 [0.5–4.9]	0.5 [0.4–0.8]	9.3 [5.2–16.0]	4.4 [1.8–10.4]	8.4 [7.5–9.4]	8.5 [4.6–15.0]	8.8 [3.5–20.4]
3–4	15.3 [14.1–16.5]	9.2 [5.2–15.9]	8 [3.8–16.3]	0.3 [0.1–0.5]	15.1 [9.8–22.3]	10 [5.1–18.8]	15.6 [14.4–16.8]	9.6 [5.7–15.9]	6.2 [2.3–15.3]
5–9	25.7 [24.3–27.1]	19.1 [13.3–26.6]	18.1 [11.3–27.5]	0.2 [0.1–0.4]	18.5 [12.3–27]	12.9 [7.6–21.0]	25.4 [24–26.8]	11.3 [6.6–18.7]	4.8 [1.8–11.9]
10+	37 [35.5–38.6]	68 [59.5–75.4]	71.1 [61.3–79.3]	0.1 [0–0.3]	42.5 [34.3–51.2]	69.6 [59.9–77.9]	37 [35.5–38.5]	26.9 [19.5–35.8]	2.8 [1.1–6.8]
Mean	14.3	111.1	86.7	0.1	45.7	84.8	14.3	60.4	1.2
aAORc	1.00	3.40 (2.42–4.78)	3.42 (2.25–5.22)	1.00	836 (516–1356)	2504 (1191–5267)	1.00	0.15 (0.07–0.32)	0.00 (0.00–0.01)
Non-age standardised:
Mean (sd)	14.3 (43.1)	90.1 (345.0)	76.4 (166.6)	0.1 (0.5)	44.7 (121.6)	74.2 (165.5)	14.3 (43.1)	44.6 (323.6)	1.3 (3.2)
Median (IQR)	6 (3–15)	17 (6–50)	19 (6–70)	0 (0–0)	6 (2–25)	19 (5–70)	6 (3–5)	2 (0–9)	0 (0–1)
Past 5 years
Age standardised:
% [95 % CI]
0	0	0	0	N/A			0	54.1 [45.7–62.3]	93.5 [89.6–96.1]
1	62.7 [61.3–64.0]	15.6 [10.1–23.3]	26.7 [16.5–40.3]		32.2 [24.2–41.5]	26.3 [16.2–39.8]	62.7 [61.3–64]	16.1 [10.5–23.9]	3.3 [1.6–6.5]
2	11.4 [10.5–12.4]	10.7 [6.4–17.5]	5.5 [2.5–11.9]		13.5 [8.5–20.8]	6.8 [3.4–13.0]	11.4 [10.5–12.4]	5.5 [2.5–11.3]	1.4 [0.4–4.7]
3–4	11.3 [10.4–12.2]	15.3 [10–22.8]	19.4 [11–31.7]		15.7 [10.4–23.1]	19.1 [10.9–31.3]	11.3 [10.4–12.2]	9.7 [5.3–16.9]	1.4 [0.4–4.7]
5–9	8.4 [7.7–9.2]	22.6 [16.4–30.3]	13.5 [7.1–24.3]		11.9 [7.5–18.3]	12.6 [6.4–23.3]	8.4 [7.7–9.2]	6.1 [3.1–11.7]	0.4 [0–2.5]
10+	6.3 [5.7–6.9]	35.8 [27.8–44.8]	34.8 [23.7–47.9]		26.7 [19.7–35.2]	35.3 [24.2–48.1]	6.3 [5.7–6.9]	8.5 [4.7–15.2]	0
Mean	3	15.8	17.3		12.2	17.5	3.0	3.7	0.1
aAORc	1.00	9.36 (6.23–14.08)	6.22 (3.57–10.84)				1.00	0.01 (0.00–0.03)	0.00 (0.00–0.00)
Non-age standardised:
Mean (sd)	3.0 (5.3)	15.9 (35.2)	18.1 (43.5)		12.3 (31.7)	18.3 (43.7)	3.0 (5.3)	3.6 (16.6)	0.2 (0.7)
Median (IQR)	1 (1–3)	6 (2–16)	5 (2–30)		3 (1–10)	5 (2–30)	1 (1–3)	0 (0–2)	0 (0–0)
Past year				N/A
Age standardised:
% [95 % CI]
0	6.1 [5.4–6.9]	3.9 [1.9–8.1]	6 [2.2–15.5]		14.9 [9.6–22.2]	5.9 [2.2–15.3]	6.1 [5.4–6.9]	60.8 [51.8–69.1]	97.7 [94.1–99.2]
1	77.1 [75.8–78.4]	36.0 [27.8–45.1]	45.8 [33.2–59.0]		42.6 [33.9–51.7]	45.3 [32.8–58.4]	77.1 [75.8–78.4]	21.6 [15.0–30.2]	0.8 [0.1–5.1]
2	8.0 [7.2–8.8]	13 [8.0–20.4]	8.5 [3.9–17.6]		9.7 [5.8–15.7]	9.0 [4.3–17.9]	8.0 [7.2–8.8]	6.2 [3.2–11.8]	0.7 [0.2–2.9]
3–4	5.4 [4.8–6.1]	16.1 [10.8–23.5]	12.8 [7–22.4]		13.1 [8.6–19.6]	13.9 [7.7–23.8]	5.4 [4.8–6.1]	7.1 [3.7–13.0]	0.7 [0.1–5.1]
5–9	2.2 [1.9–2.7]	17.6 [11.7–25.5]	7.3 [2.8–17.4]		8.6 [4.7–15.3]	6.4 [2.2–16.9]	2.2 [1.9–2.7]	3.7 [1.5–9.0]	0
10+	1.2 [0.9–1.5]	13.4 [8.0–21.7]	19.6 [10.4–34.0]		11.2 [6.4–18.8]	19.5 [10.4–33.7]	1.2 [0.9–1.5]	0.7 [0.1–4.5]	0
Mean	1.4	4.5	5.0		3.5	4.9	1.4	0.9	0
aAORc	1.00	8.29 (5.25–13.09)	4.84 (2.50–9.37)				1.00	0.04 (0.02–0.08)	0.00 (0.00–0.00)
Non-age standardised:
Mean (sd)	1.4 (2.0)	4.5 (8.5)	5.1 (11.7)		3.5 (8.4)	4.9 (11.7)	1.5 (2.0)	0.9 (1.8)	0.1 (0.4)
Median (IQR)	1 (1–1)	2 (1–5)	1 (1–4)		1 (1–4)	1 (1–4)	1 (1–1)	0 (0–1)	0 (0–0)
New partner, past year				N/A
Age standardised:
% [95 % CI]
0	77.7 [76.6–78.8]	43.3 [34.8–52.2]	49.8 [37.1–62.5]		55.7 [47.0–64.1]	50.8 [38.1–63.4]	77.7 [76.6–78.8]	80.1 [72.4–86.1]	97.7 [94.1–99.2]
1	13.2 [12.3–14.2]	14.8 [10.1–21.3]	15.6 [9.3–25.1]		13.1 [9.1–18.6]	15.6 [9.3–25.0]	13.2 [12.3–14.2]	9.6 [5.6–16.0]	1.9 [0.6–5.7]
2	4.5 [4.0–5.1]	7.8 [4.1–14.2]	4.5 [1.7–11.6]		6.1 [3.3–11.0]	4.8 [1.9–11.8]	4.5 [4.0–5.1]	5.2 [2.7–9.9]	0.4 [0.0–2.5]
3–4	2.7 [2.3–3.1]	12.3 [7.9–18.8]	9.5 [4.3–19.5]		9.7 [6.0–15.4]	9.3 [4.1–19.8]	2.7 [2.3–3.1]	2.7 [0.9–8.1]	0
5–9	1.4 [1.1–1.7]	15.6 [9.5–24.5]	14.1 [6.1–29.2]		10.0 [5.0–18.8]	13.1 [5.4–28.4]	1.4 [1.1–1.7]	1.7 [0.5–6.0]	0
10+	0.5 [0.4–0.7]	6.2 [3.2–11.5]	6.5 [2.9–13.9]		5.4 [2.7–10.5]	6.4 [2.9–13.6]	0.5 [0.4–0.7]	0.7 [0.1–4.5]	0
Mean	0.5	3.2	3.6		2.6	3.5	0.5	0.5	0
aAORc	1.00	6.24 (3.86–10.08)	4.32 (2.35–7.95)				1.00	0.76 (0.47–1.23)	0.08 (0.03–0.22)
Non-age standardised:
Mean (sd)	0.5 (1.4)	3.2 (8.5)	3.9 (11.8)		2.6 (8.3)	3.7 (11.8)	0.5 (1.4)	0.5 (1.6)	0.0 (0.2)
Median (IQR)	0 (0–0)	1 (0–4)	1 (0–3)			1 (0–3)	0 (0–0)	0 (0–0)	0 (0–0)
Number of condomless-sex partners, past year				N/A
Age standardised:
% [95 % CI]
0	19.5 [18.3–20.9]	43.1 [34.4–52.3]	43.4 [32.3–55.3]		42.9 [32.6–54.0]	30.4 [20.0–43.3]	19.3 [18.1–20.6]	73.7 [65.5–80.5]	98.8 [95.0–99.7]
1	72.4 [70.9–73.8]	32.2 [24.5–41.0]	40.1 [29.2–52.1]		37.1 [27.4–48.1]	49.7 [36.6–62.9]	72.7 [71.3–74.1]	14.7 [9.5–22.1]	1.2 [0.3–5.0]
2+	8.0 [7.3–8.9]	24.7 [17.6–33.4]	16.4 [8.8–28.8]		19.9 [11.7–31.9]	19.8 [10.4–34.6]	7.9 [7.2–8.8]	11.6 [7.3–17.9]	0
Mean	1.0	1.2	1.0		1.1	1.3	1.0	0.5	0.01
aAORc	1.00	0.60 (0.30–1.18)	0.43 (0.21–0.88)				1.00	0.10 (0.06–0.16)	0.00 (0.00–0.01)
Non-age standardised:
Mean (sd)	1.0 (1.0)	1.2 (2.6)	1.2 (3.1)		1.2 (2.7)	1.5 (3.2)	1.0 (1.0)	0.5 (1.4)	0.01 (0.1)
Median (IQR)	1 (1–1)	1 (0–1)	1 (0–1)		1 (0–1)	1 (0–1)	1 (1–1)	0 (0–1)	0 (0–0)

^aUnweighted, weighted denominators defined as participants who reported at least one sexual partner in the 5 years prior to interview

^bMSM who identified as gay in Natsal-3 are a subset of all MSM

^cAge-adjusted odds ratio (aAOR) for comparing to MSEW