Physical activity levels in three Brazilian birth cohorts as assessed with raw triaxial wrist accelerometry

doi:10.1093/ije/dyu203

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Int J Epidemiol. 2014 Dec; 43(6): 1959–1968.

Published online 2014 Oct 30. doi: 10.1093/ije/dyu203

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Table 3.

Acceleration mean and 95% confidence interval by socioeconomic status quintiles in the three Pelotas (Brazil) birth cohorts, for males and for females

Socioeconomic quintiles	1982 cohort (30y)				1993 cohort (18y)				2004 cohort (7y)
Socioeconomic quintiles	N	Acc mean (mg)	95% CI	P^a	N	Acc mean (mg)	95% CI	P^a	N	Acc mean (mg)	95% CI	P^a
	Males
				<0.001				<0.001				<0.001
Q1 (poorest)	272	39.4	38.0–40.9		284	47.8	46.1–49.5		134	68.3	65.4–71.1
Q2	264	38.7	37.4–40.1		355	47.4	45.8–49.1		195	67.7	65.0–70.5
Q3	330	39.5	38.3–40.7		356	43.6	42.2–45.0		297	64.6	62.6–66.7
Q4	110	37.3	35.3–39.4		394	41.7	40.4–43.1		287	62.3	61.0–65.6
Q5 (wealthiest)	240	35.3	33.9–37.7		370	39.1	37.8–40.3		405	61.0	59.4–62.7
	Females
				<0.001				<0.001				<0.001
Q1 (poorest)	363	34.5	33.6–35.5		436	37.7	36.8–38.7		125	59.2	56.5–61.9
Q2	274	34.7	33.6–35.8		354	36.0	35.1–36.9		204	56.8	55.0–58.7
Q3	336	33.3	32.3–34.2		366	34.8	33.9–35.9		297	55.8	54.2–57.4
Q4	127	31.8	30.4–33.1		344	34.4	33.3–35.5		225	52.9	51.2–54.7
Q5 (wealthiest)	217	30.2	29.2–31.3		331	32.1	31.6–33.0		386	52.3	51.2–53.5

^aP-values represent the result of Kruskal-Wallis tests for comparing acc means (mg) across socioeconomic quintiles in each cohort.