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Table 1 Characteristics of the study population (n = 2001)a, stratified by ethnicity

From: Differences in Chlamydia trachomatis seroprevalence between ethnic groups cannot be fully explained by socioeconomic status, sexual healthcare seeking behavior or sexual risk behavior: a cross-sectional analysis in the HEalthy LIfe in an Urban Setting (HELIUS) study

  Dutch (n = 392) South Asian Surinamese (n = 373) African Surinamese (n = 317) Ghanaian (n = 193) Turkish (n = 389) Moroccan (n = 337) Total (n = 2001)
Demographics
 Sex [n,%] (n = 2001)
  Female 214 54.6% 185 49.6% 193 60.9% 121 62.7% 167 43.4% 174 51.6% 1056 52.8%
 Migration generation [n,%] (n = 1609)
  First generation N/A N/A 82 22.0% 136 42.9% 151 78.2% 137 35.2% 117 34.7% 623 38.7%
  Age in years [median, IQR] (n = 2001) 28 25–31 28 23–31 27 23–31 27 23–32 29 25–32 29 25–32 28 24–31
Socioeconomic status
 Educational level [n,%] (n = 1995)
  Low 21 5.4% 79 21.2% 51 16.1% 68 35.4% 143 36.9% 88 26.3% 450 22.6%
  Intermediate 94 24.0% 163 43.5% 178 56.3% 89 46.4% 166 42.8% 157 46.8% 847 42.5%
  High 277 70.7% 130 35.0% 87 27.5% 35 18.2% 79 20.4% 90 26.8% 698 35.0%
 Occupational level [n,%] (n = 1717)
  Low 53 15.2% 125 38.1% 112 44.1% 94 64.0% 172 49.3% 112 38.6% 668 38.9%
  Intermediate 64 18.3% 104 31.7% 90 35.4% 37 25.2% 110 31.5% 114 39.3% 519 30.2%
  High 232 66.5% 99 30.2% 52 20.5% 16 10.9% 67 19.2% 64 22.1% 530 30.9%
Sexual risk behavior
 Lifetime number of sex partners [median, IQR] (n = 1901) 7 3–13 3 1–6 5 3–10 4 2–6 1 1–7 2 1–7 4 1–10
 Age in years at sexual debut [median, IQR] (n = 1844) 17 16–19 17 16–19 16 15–18 17 16–19 18 16–22 18 16–22 17 16–19
Sexual contacts and condom use (preceding 6 months) [n,%] (n = 1836)
 No sexual contact 48 12.5% 67 18.8% 40 13.2% 43 26.5% 63 18.5% 61 19.7% 322 17.3%
 Steady partner onlyb 239 62.1% 236 66.3% 185 61.1% 93 57.4% 215 63.1% 200 64.5% 1168 62.9%
 Consistent condom use with casual partnersc 30 7.8% 31 8.7% 37 12.2% 11 6.8% 32 9.4% 29 9.4% 170 9.2%
 Inconsistent condom use with casual partnersc 68 17.7% 22 6.2% 41 13.5% 15 9.3% 31 9.1% 20 6.5% 197 10.6%
Sexual health seeking behavior
 HIV testing (preceding 6 months) [n,%] (n = 1952)
  Yes 44 11.3% 37 10.0% 83 26.4% 41 21.8% 26 6.9% 29 8.7% 260 13.2%
 STI testing (preceding 6 months) [n,%] (n = 1951)
  Yes 70 17.9% 49 13.2% 104 33.1% 40 21.2% 29 7.7% 45 13.5% 337 17.1%
Primary outcome
C. trachomatis seropositivity [n,%] (n = 2001)
  Overall 147 37.5% 150 40.2% 227 71.6% 131 67.9% 121 31.1% 117 34.7% 893 44.6%
  Female 79 36.9% 77 41.6% 147 76.2% 81 66.9% 46 27.2% 66 37.9% 496 47.0%
  Male 68 38.2% 73 38.8% 80 64.5% 50 69.4% 75 34.1% 51 31.3% 397 42.0%
  1. IQR Interquartile range, N/A Not available, HIV Human immunodeficiency virus, STI Sexually transmitted infection
  2. Data are presented as n (%) or median (IQR)
  3. aNumbers may not add up due to missing values
  4. bSex exclusively with one partner, regardless of condom use
  5. cHas had a casual sex partner, irrespective of having had a steady partner