Lifestyle

Sedentary behavior


LASA101
LASA301 (constructed variables, to be processed)
LASA501 (constructed variables, to be processed)

Contact: Marjolein Visser

Background
Over the last decade, it has been suggested that sedentary behavior is an important determinant of health, independent of other physical activity (1-3). Sedentary behavior is higher in older persons compared to any other age group (4,5). Based on objective measurements of sedentary behavior using accelerometers (smart-sensors), older adults are 59-75% of their time sedentary (6-17).

Measurement instruments in LASA
Sedentary behavior was assessed in the LASA study for the first time by means of a self-administered questionnaire in 2008/09 (LASA G-wave). The questionnaire consisted of 11 sedentary items that were adapted from previous questionnaires (18). The questionnaire was developed and validated among 83 LASA participants aged 65-92 years to rank older adults according to sedentary behavior (18).

Participants were asked to complete the following questions for a weekday as well as for a weekend day. If participants performed two activities at the same time, for example listening to music while knitting, they were instructed to report only one of the two activities (arbitrarily) to avoid double counting.

On average, during a weekday (Monday - Friday), how many hours / minutes in a day (24 hours) do you ....

1*

take a nap on a chair or couch?

  ___ h   ____ min

2*

read while being seated or lying down? 

  ___ h   ____ min

3*

listen to music while being seated or lying down? 

  ___ h   ____ min

4*

watch television, video or DVD? 

  ___ h   ____ min

5*

perform a hobby while being seated, such as knitting, doing jigsaw puzzles or playing a music instrument?

  ___ h   ____ min

6*

talk (in person or on the phone) with friends, family or acquaintances while being seated?

  ___ h   ____ min

7

sit at the computer for work or leisure?

  ___ h   ____ min

8

perform sitting activities such as administrative tasks, writing a letter or having a meeting?

  ___ h   ____ min

9

sit in car, bus or train?

  ___ h   ____ min

10

visit church/mosque** or (movie) theater?

  ___ h   ____ min

 

** mosque was added only for migrants (MB)

 

On average, during a weekend day (Saturday and Sunday), how many hours / minutes in a day (24 hours) do you ....

1*

take a nap on a chair or couch?

  ___ h   ____ min

2*

read while being seated or lying down?.

  ___ h   ____ min

3*

listen to music while being seated or lying down?  

  ___ h   ____ min

4*

watch television, video or DVD?

  ___ h   ____ min

5*

perform a hobby while being seated, such as knitting, doing jigsaw puzzles or playing a music instrument?

  ___ h   ____ min

6*

talk (in person or on the phone) with friends, family or acquaintances while being seated?

  ___ h   ____ min

7

sit at the computer for work or leisure?

  ___ h   ____ min

8

perform sitting activities such as administrative tasks, writing a letter or having a meeting?

  ___ h   ____ min

9

sit in car, bus or train?

  ___ h   ____ min

10

visit church or (movie) theater?

  ___ h   ____ min

 


Validity
Participants with a total sedentary time>24 hours should be excluded from data analysis. The total time spend on sedentary activities can be calculated for an average day of the week [(weekday time * 5 + weekend day time * 2) / 7 ].

In the validation study, the total time spent on the 10 items (10.2±1.2) h/day was not statistically different from total sedentary time as objectively measured with accelerometry (10.4±3.5), P=0.6) (18).

The total time spent on 6 items was best correlated with total sedentary time as measured with accelerometry: napping, reading, listening to music, watching TV, hobby, and talking with friends (Spearman correlation coefficient r=0.46, p<0.05). These 6 items are marked with an asterisk in the questionnaire above. The 6-item questionnaire is able to rank older persons based on their time spent on sedentary behavior (18).

Reliability
The test-retest reliability was tested in 63 LASA participants 23±6 days apart. The intraclass correlation coefficient (ICC) of the 6-item questionnaire was 0.71 (12). An ICC of at least 0.70 is considered as adequately reliable.

Questionnaires
LASAG101 / LASAH101 / LAS3B101 / LASAI101 (self-administered questionnaire, in Dutch); LASMB101 (medical interview, in Dutch)

Variable information
LASAG101 / LASAH101 / LAS3B101 / LASMB101 / LASAI101
(pdf)

Availability of information per wave1:

 

B

C

D

E


2B*

F

G

H



3B*

MB*

I*

Sedentary behavior

-

-

-

-

-

Sa

Sa

Sa

Me 

Sa

 1 More information about the LASA data collection waves is available on:
http://www.lasa-vu.nl/data/lasa/sampleLASAdatacollection.html

* 2B=baseline second cohort;
   3B=baseline third cohort;
   MB=migrant cohort;
   I=Under Construction

Sa=data collected in self-administered questionnaire;
Me=data collected in medical interview

Previous use in LASA
Within LASA, sedentary behavior items have not been used at the moment.

References