Table 1

Sample characteristics of the 2940 survey participants and of those diagnosed with an STI in the 18 months after survey completion

VariableTotal sample characteristicsOutcome: STI diagnosis in follow-up period
n % (column)n % (row)
Demographic
Age (years)
 25+ (max. 80)1739 (59.2)119 (6.8)
 15–241201 (40.9)121 (10.1)
Gender
 Male975 (33.2)92 (9.4)
 Female1965 (66.8)148 (7.5)
IMD quintile
 1 (higher deprivation)1211 (41.4)121 (10.0)
 2839 (28.6)75 (8.9)
 3501 (17.1)33 (0.4)
 4249 (8.5)7 (0.3)
 5 (lower deprivation)129 (4.4)4 (0.7)
Ethnic group
 White British/Irish1052 (35.8)49 (4.7)
 White other381 (13.0)23 (6.0)
 Black African324 (11.0)29 (9.0)
 Black Caribbean484 (16.5)79 (16.3)
 Black other35 (1.2)6 (17.1)
 Mixed/other376 (12.8)38 (10.1)
 Asian288 (9.8)16 (5.6)
Degree-level education
 No1493 (51.3)160 (10.7)
 Yes1420 (48.8)79 (5.6)
Currently employed
 No801 (27.4)76 (9.5)
 Yes2120 (72.6)164 (7.7)
Behavioural and attitudinal
Contraception use in p12m (self or partner)
 Any barrier method1793 (62.4)143 (8.0)
 Permanent/LARC/hormonal (without barrier)636 (22.1)48 (7.6)
 Emergency/natural/no method only446 (15.5)40 (9.0)
Early sexual debut (<16 years of age)
 No1272 (43.3)128 (10.1)
 Yes1668 (56.7)112 (6.7)
Self-perceived risk
 Don't think I'm at risk of getting any STI1348 (54.2)133 (9.9)
 Think I'm at risk of getting STIs1139 (45.8)72 (6.3)
Attitudes to concurrency
 Negative attitude2517 (90.6)181 (7.2)
 Positive attitude262 (9.4)38 (14.5)
Number of partners in p12m
 11072 (37.1)56 (5.2)
 2–41212 (41.9)95 (7.8)
 5 or more609 (21.1)84 (13.8)
Number of new partners in p12m
 None871 (30.4)51 (5.9)
 1754 (26.3)60 (8.0)
 2–4849 (29.6)72 (8.5)
 5 or more396 (13.8)49 (12.4)
Partner concurrency in p12m
 No1944 (69.9)124 (6.4)
 Yes837 (30.1)95 (11.4)
Age mixing with any of most recent three partners
 No1648 (63.6)133 (8.1)
 Yes942 (36.4)81 (8.6)
Ethnic mixing with any of most recent three partners
 No1249 (47.7)81 (6.5)
 Yes1369 (52.3)136 (9.9)
Current partnership type
 Married/committed only1350 (46.4)80 (5.9)
 Casual only934 (32.1)97 (10.4)
 Both97 (3.3)14 (14.4)
 Don't have partner527 (18.1)46 (8.7)
Clinical*
Time since last STI diagnosis
 Never2306 (78.4)117 (5.1)
 At survey attendance454 (15.4)91 (20.0)
 Within the 6 months before survey106 (3.6)16 (15.1)
 Within the 7–12 months before survey74 (2.5)16 (21.6)
Types of STI previously diagnosed
 None2306 (78.4)117 (5.1)
 CT only282 (9.6)36 (12.8)
 Any other STI (including or excluding CT)352 (12.0)87 (24.7)
Number of previous STI episodes
 None2306 (78.4)117 (5.1)
 1 at survey only376 (12.8)62 (16.5)
 1 episode in p12m (±1 at survey)230 (7.8)48 (20.9)
 ≥2 episodes in p12m (±1 at survey)28 (1.0)13 (46.4)
  • Missing data: IMD (11), degree-level education (27), current employment (19), contraception use (65), self-perceived risk (453), attitudes to concurrency (161), number of partners in p12m (47), number of new partners in p12m (70), partner concurrency in p12m (159), age mixing (350), ethnic mixing (322) and current partnership type (32).

  • *The time frame for clinical data was the survey attendance (±6 weeks) and the p12m.

  • IMD, Index of Multiple Deprivation; LARC, long-acting reversible contraception; p12m, previous 12 months.