Table 6.

Factorial main effects for all outcomes (N=39).

2×2×2 intervention components	Days of self-weighing			Mean of participants’ weekly PAa
	Mean ratio (95% CI)	Estimate (SE)b	Mean ratio (95% CI)		Estimate (SE)
Self-weighing (reference=loss), lottery	0.35 (0.15-0.80)	–1.05c (0.40)	5.38 (0.34-85.92)		1.68 (1.36)
Gestational weight gain goal (reference=overall), monthly	0.69 (0.30-1.58)	–0.36 (0.40)	0.24 (0.015-3.80)		–1.43 (1.36)
PA goal (reference=no incentives), incentives	1.26 (0.55-2.88)	0.23 (0.40)	0.79 (0.05-12.56)		–0.24 (1.36)

^aPA: physical activity.

^bEstimates and SEs are on the logarithmic scale; the mean ratio is obtained by exponentiating the main effect estimate.

^cP<.01.