Table 3

ORs for SARS-CoV-2 seropositivity by ethnicity, progressively adjusted for social factors

OR (95% CI)Per cent reduction in LR statistics for ethnicity
WhiteBlackSouth AsianChineseMixedOther
Baseline model (ie, ethnicity+age+sex)1.00 (0.92 to 1.09)2.66 (1.98 to 3.59)1.66 (1.18 to 2.35)0.99 (0.46 to 2.13)1.42 (1.05 to 1.91)1.79 (1.30 to 2.48)
+geographical factors1.00 (0.92 to 1.09)2.21 (1.64 to 2.99)1.42 (1.01 to 2.01)0.88 (0.41 to 1.90)1.34 (0.99 to 1.81)1.53 (1.11 to 2.12)38
+occupational factors1.00 (0.91 to 1.09)1.93 (1.43 to 2.62)1.31 (0.92 to 1.85)0.92 (0.43 to 1.99)1.32 (0.98 to 1.79)1.46 (1.05 to 2.03)56
+household factors1.00 (0.91 to 1.10)1.92 (1.41 to 2.61)1.22 (0.86 to 1.73)0.92 (0.43 to 1.99)1.33 (0.98 to 1.80)1.39 (1.00 to 1.93)60
+shopping frequency and use of public transport1.00 (0.91 to 1.10)1.88 (1.38 to 2.56)1.2 (0.84 to 1.71)0.89 (0.41 to 1.92)1.31 (0.97 to 1.78)1.36 (0.98 to 1.89)64
+deprivation and education1.00 (0.91 to 1.10)1.83 (1.34 to 2.50)1.2 (0.84 to 1.71)0.89 (0.41 to 1.93)1.31 (0.97 to 1.77)1.35 (0.97 to 1.87)67
  • Analysis among 14 571 participants; exclusions as in figure 1. ORs relative to participants of White ethnicity, adjusted for age and sex (baseline model), with progressive adjustment for social factors where indicated; group-specific variances used to calculate 95% CIs. See online supplemental table S3 for further details on characteristics. LR statistic for ethnicity in the baseline model=48.2.

  • LR, likelihood ratio.