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Table 1 Information on how each variable was used in the matching process

From: Healthcare use attributable to COVID-19: a propensity-matched national electronic health records cohort study of 249,390 people in Wales, UK

Variable

Controlled by

Deprivation of local area

Included in propensity-matched score

Co-morbidities

Included in propensity-matched score

Number in household

Included in propensity-matched score

Number of previous COVID tests

Included in propensity-matched score

Gender

Exact matching

Region

Exact matching

Age

Exact matching

Testing location

Exact matching