sd24 | R Documentation |
^{Shift}
)sd24()
computes the 24 hours sleep duration for the shift version of
the Munich ChronoType Questionnaire (MCTQ).
sd24(sd, napd, nap)
sd |
A |
napd |
A |
nap |
A |
Standard MCTQ functions were created following the guidelines in Roenneberg, Wirz-Justice, & Merrow (2003), Roenneberg, Allebrandt, Merrow, & Vetter (2012), and from The Worldwide Experimental Platform (theWeP, n.d.).
\mu
MCTQ functions were created following the guidelines in Ghotbi
et al. (2020), in addition to the guidelines used for the standard MCTQ.
MCTQ^{Shift}
functions were created following the
guidelines in Juda, Vetter, & Roenneberg (2013), in addition to the
guidelines used for the standard MCTQ.
See the References section to learn more.
The mctq
package works with a set of object classes specially created to
hold time values. These classes can be found in the
lubridate and hms
packages. Please refer to those package documentations to learn more about
them.
Some operations may produce an output with fractional time (e.g.,
"19538.3828571429s (~5.43 hours)"
, 01:15:44.505
). If you want, you
can round it with mctq:::round_time()
.
Our recommendation is to avoid rounding, but, if you do, make sure that you only round your values after all computations are done. That way you avoid round-off errors.
If nap == TRUE
, a Duration
object
corresponding to the vectorized sum of sd
and napd
in a circular time
frame of 24 hours.
If nap == FALSE
, a Duration
object equal to
sd
.
Juda, Vetter & Roenneberg (2013) and The Worldwide Experimental Platform
(n.d.) guidelines for sd24()
(SD24
) computation are as follows.
This computation must be applied to each section of the questionnaire.
If the respondent don't usually take a nap in a particular shift or
between two free days after a particular shift, sd24()
will return only
SD_{W/F}^{M/E/N}
.
If you are visualizing this documentation in plain text, you may have some trouble understanding the equations. You can see this documentation on the package website.
SD24_{W/F}^{M/E/N} = SD_{W/F}^{M/E/N} + NapD_{W/F}^{M/E/N}
Where:
SD24_{W/F}^{M/E/N}
= 24 hours sleep duration between two days in a
particular shift or between two free days after a particular shift.
SD_{W/F}^{M/E/N}
= Sleep duration between two days in a particular
shift or between two free days after a particular shift.
NapD_{W/F}^{M/E/N}
= Nap duration between two days in a particular
shift or between two free days after a particular shift.
* W
= Workdays; F
= Work-free days, M
=
Morning shift; E
= Evening shift; N
= Night shift.
Ghotbi, N., Pilz, L. K., Winnebeck, E. C., Vetter, C., Zerbini, G., Lenssen,
D., Frighetto, G., Salamanca, M., Costa, R., Montagnese, S., & Roenneberg, T.
(2020). The \mu
MCTQ: an ultra-short version of the Munich ChronoType
Questionnaire. Journal of Biological Rhythms, 35(1), 98-110.
\Sexpr[results=rd]{tools:::Rd_expr_doi("10.1177/0748730419886986")}
Juda, M., Vetter, C., & Roenneberg, T. (2013). The Munich ChronoType
Questionnaire for shift-workers (MCTQ^{Shift}
). Journal of
Biological Rhythms, 28(2), 130-140. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1177/0748730412475041")}
Roenneberg T., Allebrandt K. V., Merrow M., & Vetter C. (2012). Social jetlag and obesity. Current Biology, 22(10), 939-43. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.cub.2012.03.038")}
Roenneberg, T., Wirz-Justice, A., & Merrow, M. (2003). Life between clocks: daily temporal patterns of human chronotypes. Journal of Biological Rhythms, 18(1), 80-90. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1177/0748730402239679")}
The Worldwide Experimental Platform (n.d.). MCTQ. https://www.thewep.org/documentations/mctq/
Other MCTQ functions:
fd()
,
gu()
,
le_week()
,
msf_sc()
,
msl()
,
napd()
,
sd_overall()
,
sd_week()
,
sdu()
,
sjl()
,
sjl_sc()
,
sjl_weighted()
,
so()
,
tbt()
## Scalar example
sd <- lubridate::dhours(6)
napd <- lubridate::dhours(0.5)
nap <- TRUE
sd24(sd, napd, nap)
#> [1] "23400s (~6.5 hours)" # Expected
sd <- lubridate::dhours(9)
napd <- lubridate::dhours(1.5)
nap <- TRUE
sd24(sd, napd, nap)
#> [1] "37800s (~10.5 hours)" # Expected
sd <- lubridate::dhours(6.5)
napd <- lubridate::as.duration(NA)
nap <- FALSE
sd24(sd, napd, nap)
#> [1] "23400s (~6.5 hours)" # Expected
sd <- lubridate::as.duration(NA)
napd <- lubridate::dhours(2.3)
nap <- TRUE
sd24(sd, napd, nap)
#> [1] NA # Expected
## Vector example
sd <- c(lubridate::dhours(7.5), lubridate::dhours(8))
napd <- c(lubridate::dhours(0.75), lubridate::dhours(1))
nap <- c(TRUE, TRUE)
sd24(sd, napd, nap)
#> [1] "29700s (~8.25 hours)" "32400s (~9 hours)" # Expected
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