Efficacy of a workplace osteoporosis prevention intervention: a cluster randomized trial

BMC Public Health

Table 3 Changes in intervention effects (difference^a) for load-bearing moderate to vigorous physical activity (MVPA) results at 1st and 2nd follow-up at cluster level

	Comparison of intervention effect (difference) using summaries of unadjusted means			Comparison of intervention effect (difference) using summaries of unstandardized residuals^c
				No exclusion			Exclude 2SD outliers^b			Exclude 2SD outliers and adjusted for socioeconomic factors^d
	Difference^a	95 % CI	p	Difference^a	95 % CI	p	Difference^a	95 % CI	p	Difference^a	95 % CI	p
1st Follow-up	77.6	74.9 – 80.3	<0.0005	71.8	56.2–87.5	<0.0005	61.3	60.3–62.2	<0.0005	55.6	54.5–56.6	<0.0005
2nd Follow-up	76.4	73.7–79.1	<0.0005	74.2	71.8–76.5	<0.0005	51.2	49.5–52.9	<0.0005	50.9	49.3–52.6	<0.0005

^aDifference = difference between mean baseline and follow up measures; ^b25 cases at 1st follow-up and 21 cases at 2nd follow-up
^cAdjusted for baseline values; ^dPersonal income, education and religion

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