Self-reported sitting time and physical activity: interactive associations with mental well-being and productivity in office employees

Table 1 Baseline data on the main outcomes and socio-demographic variables

	N = 557
Gender, n (%)
Male	215 (38.7)
Female	314 (61.3)
Age, mean (SD)	42 (9)
Body Mass Index (kg/m²), mean (SD)	24.86 (10.82)
University, n (%)
Vic (Catalonia)	110 (19.8)
Basque Country	112 (20.1)
Ramon Llull – Blanquerna (Catalonia)	73 (13.1)
Vigo	261 (46.9)
Occupation, n (%)
Academic Staff	340 (63.4)
Administrative Staff	196 (36.6)
Physical Activity (MET-minutes/week), median (interquartile range)	2,742 (1,238 - 4,921)
Physical Activity¹ (MET-minutes/week), n (%)
Low	169 (31.5)
Moderate	151 (28.1)
High	217 (40.4)
Mental Well-Being at work (WEMWBS)², mean (SD)	52.6 (7.1)
Presenteeism (WLQ)³, median (interquartile range)
Time scale⁴	15 (5–25)
Mental-Interpersonal scale⁵	17 (8–28)
Output scale⁶	21 (8–29)
% of work productivity loss (WLQ Index Score)⁷, median (interquartile range)	4.5 (2.5 - 6.6)
SITTING
Time spent sitting at work (min/day), mean (SD)	287 (147)
Time spent sitting traveling to and from places (min/day), mean (SD)
Weekdays	72 (48)
Weekend days	50 (48)
Total time spent sitting (min/day), mean (SD)
Weekdays	383 (209)
Weekend days	322 (186)

SD: Standard Deviation.
¹High category: achieving a minimum total physical activity of at least 3,000 MET-minutes/weeks.
Moderate category: achieving a minimum total physical activity of at least 600 MET-minutes/weeks.
Low category: Individuals who do not meet criteria for categories 2 or 3.
²Warwick-Edinburgh Mental Well-being Scale (WEMWBS): The minimum score is 14 and the maximum is 70. Higher scores indicate better positive mental well-being.
³Each scale score indicates the percentage of time in the previous two weeks when the respondent was limited in performing a specific dimension of job tasks (from low to high rate of difficulty in performing job demands). The minimum score is 0 (limited none of the time) to 100 (limited all of the time).
⁴Five items addressing difficulty in scheduling demands.
⁵ Six items covering difficulty performing cognitive tasks at work.
⁶Five items addressing decrements in the ability to meet demands for quantity, quality and timeless of completed work.
⁷A percentage estimate of work loss based on the weighted sum of the scores from the WLQ scales.

ISSN: 1471-2458