Table 3 Behaviour change at follow‐up.

	Before	After	p Value
Number of sexual partners	N (%)	N (%)
⩾2 in past 6 months	66/401 (16.4)	23/401 (5.8)	<0.001
⩾2 in past 2 months	23/401 (5.7)	15/401 (3.7)	<0.02
Unprotected sexual intercourse	N (%)	N (%)
Any partner type	230/242 (95)	217/244 (89)	0.021
With primary partners	195/207 (94)	192/214 (90)	0.152
With non‐primary partners	44/44 (100)	25/30 (83)	NA
Episodes of sexual intercourse by partner type
Primary partners	(n = 207)	(n = 217)
All episodes
Mean (SD)	9.9 (10.1)	12.2 (16.9)	0.825
SE	0.7	1.2
Median	6.0	8.0
Unprotected episodes			0.001
Mean (SD)	10.3 (12.7)	11.2 (14.3)
SE	0.9	1.0
Median	6.0	8.0
Average rate of unprotected episodes (%)	100	92
Non‐primary partners	(n = 44)	(n = 30)
All episodes
Mean (SD)	6.59 (12.64)	6.9 (9.47)	0.001
SE	1.9	1.7
Median	2.0	2.5
Unprotected episodes			0.002
Mean	6.14 (11.90)	3.4 (4.6)
SE	1.79	0.84
Median	2.0	1.5
Average rate of unprotected episodes (%)	93	49
Proportion reporting any STI symptoms	159/401 (39.7%)	61/401 (15.3%)	<0.02

NA, not available as numbers insufficient for robust analysis.