Variation between seated and standing/walking postures among male and female call centre operators

BMC Public Health

Table 3 Outcome in variables describing similarity of exposure across time as defined in Table 1; in total and amongst male and female call centre operators.

				Difference males-females
Variable	All N = 140	Males N = 43	Females N = 97	Difference	p-value ¹
SIM1	Coefficient of variation within individuals; duration of seated periods
Mean	1.31	1.26	1.33	-0.07	0.212
Median	1.24	1.21	1.26	-0.05
sd	0.32	0.31	0.32
Range	0.69-2.34	0.70-2.09	0.69-2.34
SIM2	Coefficient of variation within individuals; duration of standing/walking periods
Mean	1.51	1.50	1.51	-0.01	0.759*
Median	1.34	1.35	1.32	0.03
sd	0.55	0.49	0.57
Range	0.58-3.37	0.64-2.85	0.58-3.37
SIM3	Correlation between the duration of periods seated and the following standing/walking period
Mean	0.07	0.07	0.08	-0.01	0.762
Median	0.04	0.04	0.06	-0.02
sd	0.22	0.22	0.22
Range	-0.42 - 1.00	-0.26 - 1.00	-0.42 - 0.85

¹Two-tailed t-tests or Mann-Whitney test (*) if significant deviation from normal distribution.

ISSN: 1471-2458