Early maternal weight gain as a risk factor for SGA in pregnancies with hyperemesis gravidarum: a 15-year hospital cohort study

Table 4 Logistic regression for 361 women treated for hyperemesis gravidarum, predicting SGA^a (n = 39 singletons were defined as SGA)

	Univariate OR^b	95% CI^c	p-value	Multivariate OR	95% CI	p-value
Smoking
Not smoking n = 344	1			1
Smoking n = 17	2.72	0.84–8.79	0.095	3.05	0.84–11.13	0.091
Parity
Para ≥ 1 n = 195	1			1
Para 0 n = 166	3.39	1.63–7.05	0.001	4.12	1.69–10.08	0.002
Prepregnancy BMI^d	0.90	0.83–0.99	0.026	0.88	0.80–0.98	0.017
Weight gain week 13-18^e
Regained n = 187	1			1
Not regained n = 174	3.54	1.67–7.51	0.001	2.66	1.11–6.34	0.028
Minimum total weight gain^f
Achieved n = 189	1			1
Not achieved n = 172	4.23	1.94–9.19	< 0.001	3.09	1.29–7.39	0.011
Age at admission	0.96	0.90–1.02	0.182	1.05	0.98–1.14	0.177

^a: Small for Gestational age according to Norwegian sex- and gender adjusted weight charts [20],
^b: Odds ratio, ^c: Confidence interval, ^d: Body mass index before pregnancy,
^e: Regained = Regained prepregnancy weight by week 13, 14, 15, 16, 17 or 18,
^f: Whether patients achieved minimal aimed weight gain specific for their category of BMI, categorized and using limits for aimed maternal weight gain according to Institute of Medicine (IOM) 2009 guidelines [18]

ISSN: 1471-2393