Covid-19 Variables search
Find the variables you need for your research by searching by variable name or datafile.
| Variable | Label | Datafile | Waves |
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| ci_smsr1 | W9 SMS reminder 1 sent |
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| ci_smsr1_d | W9 SMS reminder 1, date and time |
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| ci_smsr2 | W9 SMS reminder 2 sent |
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| ci_smsr2_d | W9 SMS reminder 2, date and time |
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| ci_smsr3 | W9 SMS reminder 3 sent |
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| ci_smsr3_d | W9 SMS reminder 3, date and time |
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| emailknown | Whether email known at start of study |
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| emailoptout | Opted out of emails |
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| i_hidp | household identifier (public release) |
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| i_ioutcome | Individual outcome |
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| j_hidp | Household Identifier (Public Release) |
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| j_ioutcome | Individual outcome |
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| k_hidp | Household Identifier (Public Release) |
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| k_ioutcome | Individual outcome |
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| mobknown | Whether mobile number known at start of study |
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| pidp | Cross-wave Person Identifier (Public Release) |
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| preletter | Prenotification letter version |
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| psu | Primary sampling unit |
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| racel_dv | Ethnic group incorp. all waves, codings, modes and bhps |
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| serologywaveadditionalincenti | Serology Wave Additional Incentive |
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