scoreFACT_B: Score the FACT-B
In FACTscorer: Scores the FACT and FACIT Family of Patient-Reported Outcome Measures
Description
Usage
Arguments
Details
Value
Note
References
Examples
View source: R/ca-scoreFACT_B.R
Description
Generates all of the scores of the Functional Assessment of Cancer Therapy -
Breast Cancer (FACT-B, v4) from item responses.
Usage
1
scoreFACT_B(df, updateItems = FALSE, keepNvalid = FALSE)
Arguments
df
A data frame with the FACT-B items, appropriately-named.
updateItems
Logical, if TRUE any original item that is
reverse coded for scoring will be replaced by its reverse coded version
in the returned data frame, and any values of 8 or 9 will be replaced
with NA. The default, FALSE, returns the original items
unmodified.
keepNvalid
Logical, if TRUE the function
returns an additional variable for each of the returned scale scores
containing the number of valid, non-missing responses from each
respondent to the items on the given scale. If FALSE (the
default), these variables are omitted from the returned data frame.
Details
Given a data frame that includes all of the FACT-B (Version 4) items as
variables, appropriately named, this function generates all of the FACT-B
scale scores. It is crucial that the item variables in the supplied data
frame are named according to FACT conventions. For example, the first
physical well-being item should be named GP1, the second GP2, and so on.
Please refer to the materials provided by http://www.facit.org for the
particular questionnaire you are using. In particular, refer to the left
margin of the official questionnaire (i.e., from facit.org) for the
appropriate item variable names.
Value
The original data frame is returned (optionally with modified
items if updateItems = TRUE) with new variables corresponding to
the scored scales. If keepNvalid = TRUE, for each scored scale an
additional variable is returned that contains the number of valid
responses each respondent made to the items making up the given scale.
These optional variables have names of the format SCALENAME_N.
The following scale scores are returned:
- PWB
Physical Well-Being subscale
- SWB
Social/Family Well-Being subscale
- EWB
Emotional Well-Being subscale
- FWB
Physical Well-Being subscale
- FACTG
FACT-G Total Score (i.e., PWB+SWB+EWB+FWB)
- BCS
Breast Cancer subscale
- FACT_B_TOTAL
FACT-B Total Score (i.e., PWB+SWB+EWB+FWB+BCS)
- FACT_B_TOI
FACT-B Trial Outcome Index (e.g., PWB+FWB+BCS)
Note
Keep in mind that this function (and R in general) is case-sensitive.
All variables should be in numeric or integer format.
This scoring function expects missing item responses to be coded as NA,
8, or 9, and valid item responses to be coded as 0, 1, 2, 3, or 4. Any
other value for any of the items will result in an error message and no
scores.
Some item variables are reverse coded for the purpose of generating the
scale scores. The official (e.g., from http://www.facit.org) SAS
and SPSS scoring algorithms for this questionnaire automatically replace
the original items with their reverse-coded versions. This can be
confusing if you accidentally run the algorithm more than once on your
data. As its default, scoreFACT_B DOES NOT replace any of your
original item variables with the reverse coded versions. However, for
consistentcy with the behavior of the other versions on
http://www.facit.org, the updateItems argument is
provided. If set to TRUE, any item that is supposed to be
reverse coded will be replaced with its reversed version in the data
frame returned by scoreFACT_B.
References
FACT-B Scoring Guidelines, available at http://www.facit.org
Examples
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## Setting up item names for fake data
G_names <- c(paste0('GP', 1:7),
paste0('GS', 1:7),
paste0('GE', 1:6),
paste0('GF', 1:7))
AC_names <- c('B1', 'B2', 'B3', 'B4', 'B5', 'B6', 'B7', 'B8', 'B9', 'P2')
itemNames <- c(G_names, AC_names)
## Generating random item responses for 8 fake respondents
set.seed(6375309)
exampleDat <- t(replicate(8, sample(0:4, size = length(itemNames), replace = TRUE)))
## Making half of respondents missing about 10% of items,
## half missing about 50%.
miss10 <- t(replicate(4, sample(c(0, 9), prob = c(0.9, 0.1),
size = length(itemNames), replace = TRUE)))
miss50 <- t(replicate(4, sample(c(0, 9), prob = c(0.5, 0.5),
size = length(itemNames), replace = TRUE)))
missMtx <- rbind(miss10, miss50)
## Using 9 as the code for missing responses
exampleDat[missMtx == 9] <- 9
exampleDat <- as.data.frame(cbind(ID = paste0('ID', 1:8),
as.data.frame(exampleDat)))
names(exampleDat) <- c('ID', itemNames)
## Returns data frame with scale scores and with original items untouched
scoredDat <- scoreFACT_B(exampleDat)
names(scoredDat)
scoredDat
## Returns data frame with scale scores, with the appropriate items
## reverse scored, and with item values of 8 and 9 replaced with NA.
## Also illustrates the effect of setting keepNvalid = TRUE.
scoredDat <- scoreFACT_B(exampleDat, updateItems = TRUE, keepNvalid = TRUE)
names(scoredDat)
## Descriptives of scored scales
summary(scoredDat[, c('PWB', 'SWB', 'EWB', 'FWB', 'FACTG',
'BCS', 'FACT_B_TOTAL', 'FACT_B_TOI')])
Example output
[1] "ID" "GP1" "GP2" "GP3" "GP4"
[6] "GP5" "GP6" "GP7" "GS1" "GS2"
[11] "GS3" "GS4" "GS5" "GS6" "GS7"
[16] "GE1" "GE2" "GE3" "GE4" "GE5"
[21] "GE6" "GF1" "GF2" "GF3" "GF4"
[26] "GF5" "GF6" "GF7" "B1" "B2"
[31] "B3" "B4" "B5" "B6" "B7"
[36] "B8" "B9" "P2" "PWB" "SWB"
[41] "EWB" "FWB" "FACTG" "BCS" "FACT_B_TOTAL"
[46] "FACT_B_TOI"
ID GP1 GP2 GP3 GP4 GP5 GP6 GP7 GS1 GS2 GS3 GS4 GS5 GS6 GS7 GE1 GE2 GE3 GE4
1 ID1 9 3 1 2 2 3 0 1 2 1 1 1 0 9 0 9 0 2
2 ID2 0 9 3 2 4 2 2 3 1 2 1 9 0 3 4 0 0 3
3 ID3 3 0 0 2 4 0 2 2 2 1 0 0 3 3 2 2 2 1
4 ID4 3 9 3 2 4 9 3 1 1 1 4 1 2 0 2 1 2 2
5 ID5 1 1 9 1 2 3 2 3 9 9 0 9 3 9 3 0 9 9
6 ID6 9 9 9 0 2 3 9 9 2 0 1 0 9 9 0 3 9 4
7 ID7 2 1 9 4 9 9 4 4 1 9 9 9 9 9 9 9 2 9
8 ID8 9 3 9 1 9 9 1 9 9 9 9 4 9 2 0 0 9 1
GE5 GE6 GF1 GF2 GF3 GF4 GF5 GF6 GF7 B1 B2 B3 B4 B5 B6 B7 B8 B9 P2 PWB
1 4 9 0 3 2 0 1 2 2 4 2 1 2 3 0 4 4 4 3 15.167
2 3 3 2 0 2 2 3 3 4 4 0 0 3 9 9 2 3 3 2 12.833
3 0 4 3 3 9 2 1 1 2 3 4 4 0 9 1 2 0 4 0 17.000
4 2 3 2 4 2 1 1 4 3 4 9 0 1 0 2 1 1 0 0 7.000
5 9 9 1 9 9 9 9 9 9 4 1 9 9 9 9 4 3 9 9 16.333
6 9 0 3 3 9 1 9 9 9 2 9 9 0 2 2 4 9 3 9 NA
7 1 9 2 0 9 9 9 4 0 9 9 1 9 9 4 9 1 3 9 8.750
8 4 9 9 9 9 0 0 9 0 9 4 2 0 3 3 9 4 9 4 NA
SWB EWB FWB FACTG BCS FACT_B_TOTAL FACT_B_TOI
1 7.000 15.0 10.0 47.167 17.000 64.167 42.167
2 11.667 7.0 16.0 47.500 23.750 71.250 52.583
3 11.000 13.0 14.0 55.000 20.000 75.000 51.000
4 10.000 10.0 17.0 44.000 23.333 67.333 47.333
5 NA NA NA NA NA NA NA
6 5.250 16.5 NA NA 15.000 NA NA
7 NA NA 10.5 NA NA NA NA
8 NA 10.5 NA NA 5.714 NA NA
[1] "ID" "GP1" "GP2" "GP3"
[5] "GP4" "GP5" "GP6" "GP7"
[9] "GS1" "GS2" "GS3" "GS4"
[13] "GS5" "GS6" "GS7" "GE1"
[17] "GE2" "GE3" "GE4" "GE5"
[21] "GE6" "GF1" "GF2" "GF3"
[25] "GF4" "GF5" "GF6" "GF7"
[29] "B1" "B2" "B3" "B4"
[33] "B5" "B6" "B7" "B8"
[37] "B9" "P2" "PWB_N" "SWB_N"
[41] "EWB_N" "FWB_N" "FACTG_N" "PWB"
[45] "SWB" "EWB" "FWB" "FACTG"
[49] "BCS_N" "FACT_B_TOTAL_N" "BCS" "FACT_B_TOTAL"
[53] "FACT_B_TOI"
PWB SWB EWB FWB
Min. : 7.000 Min. : 5.250 Min. : 7.00 Min. :10.0
1st Qu.: 9.771 1st Qu.: 7.000 1st Qu.:10.12 1st Qu.:10.5
Median :14.000 Median :10.000 Median :11.75 Median :14.0
Mean :12.847 Mean : 8.983 Mean :12.00 Mean :13.5
3rd Qu.:16.041 3rd Qu.:11.000 3rd Qu.:14.50 3rd Qu.:16.0
Max. :17.000 Max. :11.667 Max. :16.50 Max. :17.0
NA's :2 NA's :3 NA's :2 NA's :3
FACTG BCS FACT_B_TOTAL FACT_B_TOI
Min. :44.00 Min. : 5.714 Min. :64.17 Min. :42.17
1st Qu.:46.38 1st Qu.:15.500 1st Qu.:66.54 1st Qu.:46.04
Median :47.33 Median :18.500 Median :69.29 Median :49.17
Mean :48.42 Mean :17.466 Mean :69.44 Mean :48.27
3rd Qu.:49.38 3rd Qu.:22.500 3rd Qu.:72.19 3rd Qu.:51.40
Max. :55.00 Max. :23.750 Max. :75.00 Max. :52.58
NA's :4 NA's :2 NA's :4 NA's :4
FACTscorer documentation built on May 29, 2017, 3:45 p.m.
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Description Usage Arguments Details Value Note References Examples
View source: R/ca-scoreFACT_B.R
Description
Generates all of the scores of the Functional Assessment of Cancer Therapy - Breast Cancer (FACT-B, v4) from item responses.
Usage
1 | scoreFACT_B(df, updateItems = FALSE, keepNvalid = FALSE)
|
Arguments
df |
A data frame with the FACT-B items, appropriately-named. |
updateItems |
Logical, if |
keepNvalid |
Logical, if |
Details
Given a data frame that includes all of the FACT-B (Version 4) items as variables, appropriately named, this function generates all of the FACT-B scale scores. It is crucial that the item variables in the supplied data frame are named according to FACT conventions. For example, the first physical well-being item should be named GP1, the second GP2, and so on. Please refer to the materials provided by http://www.facit.org for the particular questionnaire you are using. In particular, refer to the left margin of the official questionnaire (i.e., from facit.org) for the appropriate item variable names.
Value
The original data frame is returned (optionally with modified
items if updateItems = TRUE) with new variables corresponding to
the scored scales. If keepNvalid = TRUE, for each scored scale an
additional variable is returned that contains the number of valid
responses each respondent made to the items making up the given scale.
These optional variables have names of the format SCALENAME_N.
The following scale scores are returned:
- PWB
Physical Well-Being subscale
- SWB
Social/Family Well-Being subscale
- EWB
Emotional Well-Being subscale
- FWB
Physical Well-Being subscale
- FACTG
FACT-G Total Score (i.e., PWB+SWB+EWB+FWB)
- BCS
Breast Cancer subscale
- FACT_B_TOTAL
FACT-B Total Score (i.e., PWB+SWB+EWB+FWB+BCS)
- FACT_B_TOI
FACT-B Trial Outcome Index (e.g., PWB+FWB+BCS)
Note
Keep in mind that this function (and R in general) is case-sensitive.
All variables should be in numeric or integer format.
This scoring function expects missing item responses to be coded as NA, 8, or 9, and valid item responses to be coded as 0, 1, 2, 3, or 4. Any other value for any of the items will result in an error message and no scores.
Some item variables are reverse coded for the purpose of generating the
scale scores. The official (e.g., from http://www.facit.org) SAS
and SPSS scoring algorithms for this questionnaire automatically replace
the original items with their reverse-coded versions. This can be
confusing if you accidentally run the algorithm more than once on your
data. As its default, scoreFACT_B DOES NOT replace any of your
original item variables with the reverse coded versions. However, for
consistentcy with the behavior of the other versions on
http://www.facit.org, the updateItems argument is
provided. If set to TRUE, any item that is supposed to be
reverse coded will be replaced with its reversed version in the data
frame returned by scoreFACT_B.
References
FACT-B Scoring Guidelines, available at http://www.facit.org
Examples
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | ## Setting up item names for fake data
G_names <- c(paste0('GP', 1:7),
paste0('GS', 1:7),
paste0('GE', 1:6),
paste0('GF', 1:7))
AC_names <- c('B1', 'B2', 'B3', 'B4', 'B5', 'B6', 'B7', 'B8', 'B9', 'P2')
itemNames <- c(G_names, AC_names)
## Generating random item responses for 8 fake respondents
set.seed(6375309)
exampleDat <- t(replicate(8, sample(0:4, size = length(itemNames), replace = TRUE)))
## Making half of respondents missing about 10% of items,
## half missing about 50%.
miss10 <- t(replicate(4, sample(c(0, 9), prob = c(0.9, 0.1),
size = length(itemNames), replace = TRUE)))
miss50 <- t(replicate(4, sample(c(0, 9), prob = c(0.5, 0.5),
size = length(itemNames), replace = TRUE)))
missMtx <- rbind(miss10, miss50)
## Using 9 as the code for missing responses
exampleDat[missMtx == 9] <- 9
exampleDat <- as.data.frame(cbind(ID = paste0('ID', 1:8),
as.data.frame(exampleDat)))
names(exampleDat) <- c('ID', itemNames)
## Returns data frame with scale scores and with original items untouched
scoredDat <- scoreFACT_B(exampleDat)
names(scoredDat)
scoredDat
## Returns data frame with scale scores, with the appropriate items
## reverse scored, and with item values of 8 and 9 replaced with NA.
## Also illustrates the effect of setting keepNvalid = TRUE.
scoredDat <- scoreFACT_B(exampleDat, updateItems = TRUE, keepNvalid = TRUE)
names(scoredDat)
## Descriptives of scored scales
summary(scoredDat[, c('PWB', 'SWB', 'EWB', 'FWB', 'FACTG',
'BCS', 'FACT_B_TOTAL', 'FACT_B_TOI')])
|
Example output
[1] "ID" "GP1" "GP2" "GP3" "GP4"
[6] "GP5" "GP6" "GP7" "GS1" "GS2"
[11] "GS3" "GS4" "GS5" "GS6" "GS7"
[16] "GE1" "GE2" "GE3" "GE4" "GE5"
[21] "GE6" "GF1" "GF2" "GF3" "GF4"
[26] "GF5" "GF6" "GF7" "B1" "B2"
[31] "B3" "B4" "B5" "B6" "B7"
[36] "B8" "B9" "P2" "PWB" "SWB"
[41] "EWB" "FWB" "FACTG" "BCS" "FACT_B_TOTAL"
[46] "FACT_B_TOI"
ID GP1 GP2 GP3 GP4 GP5 GP6 GP7 GS1 GS2 GS3 GS4 GS5 GS6 GS7 GE1 GE2 GE3 GE4
1 ID1 9 3 1 2 2 3 0 1 2 1 1 1 0 9 0 9 0 2
2 ID2 0 9 3 2 4 2 2 3 1 2 1 9 0 3 4 0 0 3
3 ID3 3 0 0 2 4 0 2 2 2 1 0 0 3 3 2 2 2 1
4 ID4 3 9 3 2 4 9 3 1 1 1 4 1 2 0 2 1 2 2
5 ID5 1 1 9 1 2 3 2 3 9 9 0 9 3 9 3 0 9 9
6 ID6 9 9 9 0 2 3 9 9 2 0 1 0 9 9 0 3 9 4
7 ID7 2 1 9 4 9 9 4 4 1 9 9 9 9 9 9 9 2 9
8 ID8 9 3 9 1 9 9 1 9 9 9 9 4 9 2 0 0 9 1
GE5 GE6 GF1 GF2 GF3 GF4 GF5 GF6 GF7 B1 B2 B3 B4 B5 B6 B7 B8 B9 P2 PWB
1 4 9 0 3 2 0 1 2 2 4 2 1 2 3 0 4 4 4 3 15.167
2 3 3 2 0 2 2 3 3 4 4 0 0 3 9 9 2 3 3 2 12.833
3 0 4 3 3 9 2 1 1 2 3 4 4 0 9 1 2 0 4 0 17.000
4 2 3 2 4 2 1 1 4 3 4 9 0 1 0 2 1 1 0 0 7.000
5 9 9 1 9 9 9 9 9 9 4 1 9 9 9 9 4 3 9 9 16.333
6 9 0 3 3 9 1 9 9 9 2 9 9 0 2 2 4 9 3 9 NA
7 1 9 2 0 9 9 9 4 0 9 9 1 9 9 4 9 1 3 9 8.750
8 4 9 9 9 9 0 0 9 0 9 4 2 0 3 3 9 4 9 4 NA
SWB EWB FWB FACTG BCS FACT_B_TOTAL FACT_B_TOI
1 7.000 15.0 10.0 47.167 17.000 64.167 42.167
2 11.667 7.0 16.0 47.500 23.750 71.250 52.583
3 11.000 13.0 14.0 55.000 20.000 75.000 51.000
4 10.000 10.0 17.0 44.000 23.333 67.333 47.333
5 NA NA NA NA NA NA NA
6 5.250 16.5 NA NA 15.000 NA NA
7 NA NA 10.5 NA NA NA NA
8 NA 10.5 NA NA 5.714 NA NA
[1] "ID" "GP1" "GP2" "GP3"
[5] "GP4" "GP5" "GP6" "GP7"
[9] "GS1" "GS2" "GS3" "GS4"
[13] "GS5" "GS6" "GS7" "GE1"
[17] "GE2" "GE3" "GE4" "GE5"
[21] "GE6" "GF1" "GF2" "GF3"
[25] "GF4" "GF5" "GF6" "GF7"
[29] "B1" "B2" "B3" "B4"
[33] "B5" "B6" "B7" "B8"
[37] "B9" "P2" "PWB_N" "SWB_N"
[41] "EWB_N" "FWB_N" "FACTG_N" "PWB"
[45] "SWB" "EWB" "FWB" "FACTG"
[49] "BCS_N" "FACT_B_TOTAL_N" "BCS" "FACT_B_TOTAL"
[53] "FACT_B_TOI"
PWB SWB EWB FWB
Min. : 7.000 Min. : 5.250 Min. : 7.00 Min. :10.0
1st Qu.: 9.771 1st Qu.: 7.000 1st Qu.:10.12 1st Qu.:10.5
Median :14.000 Median :10.000 Median :11.75 Median :14.0
Mean :12.847 Mean : 8.983 Mean :12.00 Mean :13.5
3rd Qu.:16.041 3rd Qu.:11.000 3rd Qu.:14.50 3rd Qu.:16.0
Max. :17.000 Max. :11.667 Max. :16.50 Max. :17.0
NA's :2 NA's :3 NA's :2 NA's :3
FACTG BCS FACT_B_TOTAL FACT_B_TOI
Min. :44.00 Min. : 5.714 Min. :64.17 Min. :42.17
1st Qu.:46.38 1st Qu.:15.500 1st Qu.:66.54 1st Qu.:46.04
Median :47.33 Median :18.500 Median :69.29 Median :49.17
Mean :48.42 Mean :17.466 Mean :69.44 Mean :48.27
3rd Qu.:49.38 3rd Qu.:22.500 3rd Qu.:72.19 3rd Qu.:51.40
Max. :55.00 Max. :23.750 Max. :75.00 Max. :52.58
NA's :4 NA's :2 NA's :4 NA's :4
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