Temporal patterns in count-to-tenfetal movement charts and their associations with pregnancy characteristics: a prospective cohort study

Table 2 Linear regression with functional principal component scores for the mean as dependent variable

	FPC1 for mean				FPC2 for mean				FPC3 for mean
	Univariate linear regression		Multiple linear regression		Univariate linear regression		Multiple linear regression		Univariate linear regression		Multiple linear regression
	Effect (95% CI)	p-value	Effect (95% CI)	p-value	Effect (95% CI)	p-value	Effect (95% CI)	p-value	Effect (95% CI)	p-value	Effect (95% CI)	p-value
Maternal BMI ^I categorized
Overweight ^II	0.04	0.173	0.11	0.162	−0.18	0.097*	−0.13	0.093	−0.11	0.029**	−0.17	0.028**
	(−0.28,1.57)		(−0.04,0.26)		(−0.39,0.03)		(−0.28,0.02)		(−0.21,-0.01)		(−0.31,-0.02)
Obesity ^III	0.09	0.007**	0.25	0.006**	−0.06	0.046**	−0.22	0.014**	0.02	0.711	0.02	0.824
	(0.04,2.59)		(0.07,0.42)		(−0.51,-0.01)		(−0.40,-0.04)		(−0.09,0.14)		(−0.15,0.20)
Primiparity	−0.03	0.353	−0.05	0.383	−0.13	0.119	−0.11	0.082	0.02	0.459	0.06	0.355
	(−1.09,0.39)		(−0.18,0.07)		(−0.30,0.03)		(−0.23,0.01)		(−0.05,0.11)		(−0.06,0.18)
Anterior placental site^b	0.04	0.183	0.10	0.127	−0.15	<0.001***	−0.32	<0.001***	−0.07	0.026**	−0.15	0.016**
	(−0.24,1.25)		(−0.03,0.22)		(−0.60,-0.27)		(−0.44, -0.19)		(−0.17,-0.11)		(−0.27,-0.03)
Gestational age, days	- 0.04	0.012**	−0.01	0.006**	0.05	0.111	0.06	0.098	0.06	0.038**	0.08	0.021**
	(−0.08,-0.01)		(−0.17,-0.03)		(−0.00,0.11)		(−0.01, 0.13)		(0.00,0.01)		(0.00,0.15)

Level of statistical significance * < 0.1, **< 0.05, ***< 0.001.
^I Body Mass Index, kg/m².
^II Maternal overweight (25≤BMI<30) versus maternal normal or underweight (BMI <25.00).
^III Maternal obesity (30≤BMI) versus maternal normal or underweight (BMI <25.00).
^b Predominantly anterior placental site reported from routine ultrasound examination in pregnancy week 18.
Linear regression with scores on the functional principal components for the smooth curve fits for the mean as the dependent variable and basic pregnancy characteristics as explanatory variables.

ISSN: 1471-2393