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Table 4 Rate ratios for severe COVID-19 by time window of hospital in-patient exposure, excluding care home residents

From: Relation of severe COVID-19 in Scotland to transmission-related factors and risk conditions eligible for shielding support: REACT-SCOT case-control study

Time window of exposure

Controls

Cases

Rate ratio (95% CI)

p-value

Less recent interval only

494 (29%)

147 (6%)

 

.

Recent interval only

470 (28%)

799 (35%)

5.9 (3.6, 9.7)

<0.001

Both intervals

741 (43%)

1335 (59%)

6.9 (4.3, 11.1)

<0.001

  1. Rate ratios are from conditional logistic regression models
  2. Dataset restricted to those exposed at some time between 5 and 24 days before first testing positive
  3. Recent interval = days 5 to 14 before first testing positive, less recent interval = days 15 to 24 before first testing positive
  4. Reference category is exposure in less recent interval only
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