Determinants of the number of antenatal visits in a metropolitan region

BMC Public Health

Table 2 Poisson regression describing differences in adjusted number of antenatal visits

Variable		Adjusted visits	Adjusted visit ratio^f	95%CI^g	p-value
Predisposing characteristics
Origin	EU 15^a	10.60 ^e	1 ^e
	Maghreb and Turkey		0.86	0.79-0.92	0.0001
	Sub-Saharan African		0.94	0.85-1.03	0.2059
	Other		0.94	0.85-1.05	0.3193
Educational level	Not finished secondary school	9.18 ^e	1 ^e
	Secondary school		1.03	0.93-1.14	0.5198
	Higher education		1.22	1.10-1.35	0.0001
Enabling characteristics
Equivalent income ^b	Low	9.20^e	1 ^e
	Moderate		1.09	1.01-1.19	0.0353
	High		1.14	1.02-1.27	0.0196
Pregnancy related characteristics
Parity	Primiparae	10.72 ^e	1 ^e
	Multiparae		0.85	0.80-0.91	<0.0001
Gestational age at initiation of care	Before week 14	11.89 ^e	1 ^e
	After week 14		0.69	0.58-0.82	<0.0001
High risk status during antenatal care^c	Yes	10.56 ^e	1 ^e
	No		0.88	0.81-0.96	0.0036
Gestational age at delivery	Before week 37	8.98 ^e	1 ^e
	After week 37		1.22	1.07-1.39	0.0028
Continuity Of Care index^d	COC <50%	10.56 ^e	1 ^e
	COC >= 50%		0.88	0.82-0.94	0.0009

^a Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, the Netherlands, Austria, Portugal, Spain, Sweden and the United Kingdom;
^bΣ incomes in the household/(1+(a*0.5)+(c*0.3)) with a: number of adults living in the same household of the wife(wife not included), c: number of children under the age of 18 living in the same household (OECD scale)[26];
^c hypertension, pre-eclampsia, gestational diabetes mellitus, preterm contractions, hospitalization, anaemia
^d Bice index or Continuity of Care index: COC = $\frac{\sum n_{j}^{2} - n}{n (n - 1)}$ (Bice, 1977)[31, 32]
n_j is the total number of visits to a provider
n is the total number of visits;
^e baseline;
^f Adjusted for effects of origin, educational level, equivalent income, parity, gestational age at booking, risk status during antenatal care, gestational age at delivery and Continuity of carer index;
^g CI = Confidence interval.

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