This function extracts specific cognitive measures from a dataset, including immediate and delayed word recall, serial subtraction, and backwards counting, along with household and person identifiers.
Value
A dataframe with the following variables:
HHID: Household ID.PN: Person number (individual identifier).Immediate and delayed word recall variables (columns starting with
"SD182M"and"SD183M").Serial subtraction variables (
SD142toSD146).Backwards counting variables (
SD124,SD129).
Details
The function selects key cognitive test results and identifiers from the dataset.
It uses dplyr::select() to retrieve:
Immediate and delayed word recall variables (those starting with "SD182M" and "SD183M").
Serial subtraction results (
SD142toSD146).Backwards counting variables (
SD124,SD129).
Examples
# Assuming `cog_data` is a dataframe with the relevant columns
extract(cog_data)
#> HHID PN SD182M1 SD182M2 SD182M3 SD182M4 SD182M5 SD182M6 SD182M7 SD182M8
#> 1 288941 93 17 9 32 33 99 39 5 23
#> 2 234057 99 53 51 38 67 31 31 64 35
#> 3 224021 72 39 10 25 27 16 58 61 40
#> 4 785284 26 63 23 34 25 62 17 25 58
#> 5 326317 7 12 27 29 38 30 64 62 30
#> 6 465208 42 15 99 5 21 6 60 22 12
#> 7 748794 9 32 63 8 15 53 59 25 31
#> 8 293626 83 52 7 12 51 8 34 32 67
#> 9 669691 36 55 63 13 57 22 4 56 56
#> 10 689448 78 7 27 18 26 22 13 25 30
#> SD182M9 SD182M10 SD183M1 SD183M2 SD183M3 SD183M4 SD183M5 SD183M6 SD183M7
#> 1 35 21 22 61 23 16 19 19 62
#> 2 14 37 12 30 26 24 25 66 25
#> 3 29 8 20 15 38 32 39 62 16
#> 4 32 61 56 24 56 21 64 57 24
#> 5 7 10 17 59 32 65 26 39 64
#> 6 3 60 56 23 7 11 9 4 11
#> 7 23 52 64 53 27 36 7 1 58
#> 8 64 54 35 7 52 54 34 40 20
#> 9 96 34 40 29 5 56 58 30 40
#> 10 15 10 56 15 6 99 13 30 3
#> SD183M8 SD183M9 SD183M10 SD142 SD143 SD144 SD145 SD146 SD124 SD129
#> 1 29 67 6 96 86 89 69 69 0 0
#> 2 36 65 67 90 86 76 76 52 0 1
#> 3 62 8 8 97 89 89 76 63 0 0
#> 4 54 56 54 97 90 78 66 50 0 0
#> 5 22 21 32 99 80 78 68 51 1 0
#> 6 59 55 96 98 98 74 79 53 1 1
#> 7 52 2 36 97 89 83 65 59 0 0
#> 8 98 53 55 91 92 83 77 50 1 0
#> 9 20 13 14 94 90 75 76 54 0 1
#> 10 11 56 63 98 90 70 64 57 0 0