Do sedentary behaviors mediate associations between socio-demographic characteristics and BMI in women living in socio-economically disadvantaged neighborhoods?

Compernolle, Sofie; De Cocker, Katrien; Abbott, Gavin; Verloigne, Maïté; Cardon, Greet; De Bourdeaudhuij, Ilse; Ball, Kylie

doi:10.1186/s12966-015-0209-1

International Journal of Behavioral Nutrition and Physical Activity

Table 3 Mediating role of sedentary behaviors on the association between socio-demographic factors and BMI

From: Do sedentary behaviors mediate associations between socio-demographic characteristics and BMI in women living in socio-economically disadvantaged neighborhoods?

Single mediation models	Action theory tests ^a		Conceptual theory tests ^b		Mediating effects		Proportion mediated
Single mediation models	α (SE)	95% CI for α	β (SE)	95% CI for β	αβ (SE)	95% CI for αβ	%
Age
Television time	0.001 (0.001)	-0.002, 0.001	0.188 (0.027)	0.134, 0.241	-	-	-
Computer time	-0.003 (0.001)	-0.006, -0.001	0.030 (0.021)	0.011, 0.070	-0.000 (0.000)	-0.000,-0.000	S
Total screen time	-0.002 (0.001)	-0.004, -0.001	0.177 (0.029)	0.120, 0.235	-0.000 (0.000)	-0.001,-0.000	S
Total sedentary time	-0.003 (0.001)	-0.005, -0.002	0.155 (0.034)	0.089, 0.221	-0.000 (0.000)	-0.001, 0.000	-
Educational level
Television time	0.137 (0.014)	0.110, 0.165	-0.000 (0.000)	-0.000, -0.000	0.017 (0.006)	0.000, 0.030	14.1
Computer time	-0.015 (0.022)	-0.058, -0.028	-0.000 (0.000)	-0.000, 0.000	-	-	-
Total screen time	0.051 (0.014)	0.024, 0.078	0.151 (0.030)	0.093, 0.210	0.006 (0.003)	0.000, 0.012	4.9
Total sedentary time	0.025 (0.012)	0.003, 0.048	0.112 (0.034)	0.045, 0.179	0.004 (0.002)	-0.001, 0.008	-
Employment status
Television time	-0.011 (0.014)	-0.016, 0.038	0.188 (0.028)	0.133, 0.242	-	-	-
Computer time	-0.270 (0.022)	-0.313, -0.288	0.011 (0.022)	-0.032, 0.053	-	-	-
Total screen time	-0.130 (0.013)	-0.155, -0.105	0.154 (0.031)	0.094, 0.214	-0.020 (0.007)	-0.033, -0.006	45.1
Total sedentary time	-0.074 (0.011)	-0.096, -0.053	0.120 (0.034)	0.052, 0.188	-0.008 (0.004)	-0.016, 0.000	_
Marital status
Television time	0.033 (0.013)	-0.007, 0.059	0.184 (0.028)	0.130, 0.238	-	-	-
Computer time	0.110 (0.021)	0.070, 0.151	0.024 (0.021)	-0.017, 0.065	-	-	-
Total screen time	0.072 (0.012)	0.048, 0.097	0.167 (0.030)	0.109, 0.226	0.011 (0.004)	0.003, 0.019	S
Total sedentary time	0.077 (0.010)	0.057, 0.098	0.132 (0.034)	0.064, 0.199	0.009 (0.005)	-0.000, 0.018	-
Number of children
Television time	-0.030 (0.006)	-0.041, -0.019	0.186 (0.028)	0.131, 0.241	-0.005 (0.002)	-0.009, -0.002	S
Computer time	-0.100 (0.009)	-0.117, -0.083	0.035 (0.022)	-0.007, 0.078	-	-	-
Total screen time	-0.063 (0.005)	-0.073, -0.053	0.182 (0.031)	0.122, 0.242	-0.010 (0.003)	-0.017,-0.003	S
Total sedentary time	-0.055 (0.004)	-0.064, -0.047	0.144 (0.035)	0.076, 0.213	-0.006 (0.003)	-0.012,0.000	-
Residential location
Television time	0.009 (0.014)	-0.019, 0.037	0.185 (0.027)	0.131, 0.238	-	-	-
Computer time	0.082 (0.025)	0.034, 0.132	0.023 (0.021)	-0.018, 0.064	-	-	-
Total screen time	0.039 (0.014)	0.011, 0.066	0.165 (0.030)	0.107, 0.223	0.007 (0.003)	0.001, 0.014	S
Total sedentary time	0.037 (0.011)	0.015, 0.060	0.126 (0.034)	0.060, 0.193	0.005 (0.003)	-0.001, 0.010	-
Country of birth
Television time	-0.062 (0.020)	-0.102, -0.022	0.173 (0.027)	0.119, 0.227	-0.008 (0.004)	-0.016,-0.001	8.2
Computer time	0.015 (0.033)	-0.051, 0.080	0.019 (0.021)	-0.022, 0.060	-	-	-
Total screen time	-0.052 (0.020)	-0.091, -0.014	0.150 (0.030)	0.091, 0.208	-0.006 (0.004)	-0.014, 0.001	-
Total sedentary time	-0.034 (0.017)	-0.066, 0.001	0.110 (0.034)	0.044, 0.176	-	-	-

^aAssociations between socio-demographic predictors and mediators.
^bAssociations between mediators and BMI, adjusting for socio-demographic predictors.
SE = standard error, CI = confidence interval, S = suppression effect, – = mediation effects were not calculated if the α-path or the β-path were not significant, proportion mediated was not calculated if the mediation effect was not significant.
All significant associations are presented in bold font.
All analyses were adjusted for total physical activity.

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ISSN: 1479-5868

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