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. 2022 Jan 17;376:e066809. doi: 10.1136/bmj-2021-066809

Table 3.

Difference-in-differences estimates (in percentage points) for change in percentage of participants using healthcare service after the week of a positive polymerase chain reaction test result for SARS-CoV-2, with participants who tested negative as comparison group

Age group and weeks after test result Primary care Specialist care
Percentage points difference in weekly rate of use: β* (95% CI) % relative difference* (95% CI) Percentage points difference in weekly rate of use: β* (95% CI) % relative difference* (95% CI)
1-5 years
1-4 11.35 (10.33 to 12.37) 339 (308 to 369) 0.12 (−0.24 to 0.49) 4 (−7 to 15)
5-8 0.74 (0.15 to 1.33) 22 (4 to 40) 0.08 (−0.35 to 0.52) 3 (−10 to 15)
9-12 0.88 (0.23 to 1.53) 26 (7 to 46) 0.08 (−0.36 to 0.51) 2 (−11 to 15)
13-24 0.42 (−0.02 to 0.86) 13 (−0 to 26) 0.11 (−0.45 to 0.24) −3 (−14 to 7)
6-15 years
1-4 11.42 (10.92 to 11.92) 471 (450 to 491) 0.18 (−0.03 to 0.38) 7 (−1 to 16)
5-8 0.34 (0.04 to 0.64) 14 (2 to 26) 0.07 (−0.16 to 0.30) 3 (−6 to 13)
9-12 0.37 (0.07 to 0.67) 15 (3 to 28) −0.12 (−0.36 to 0.12) −5 (−15 to 5)
13-24 0.01 (−0.20 to 0.22) 0 (−8 to 9) −0.40 (−0.62 to −0.17) −16 (−25 to 5)
16-19 years
1-4 12.57 (11.91 to 13.23) 401 (380 to 422) 0.17 (−0.09 to 0.43) 6 (−3 to 14)
5-8 0.34 (−0.06 to 0.75) 11 (−2 to 24) −0.19 (−0.46 to 0.09) −6 (−15 to 3)
9-12 0.20 (−0.21 to 0.60) 6 (−7 to 19) −0.41 (−0.71 to −0.10) −13 (−23 to −3)
13-24 −0.32 (−0.60 to −0.04) −10 (−19 to −1) −0.46 (−0.77 to −0.15) −15 (−25 to −5)

All models included categorical variables for healthcare use in weeks 13-24 before test week, test week, age, sex, calendar month, country of birth, and comorbidities.

*

Adjusted for confounders. Compared with rate of use during 1-12 weeks before the test for participants who tested negative.

Includes observations for weeks 25-36 for some participants.