Table 3. Toxoplasmosis seroprevalence by demographic factors among French women stratified by the different national perinatal surveys, France, 1995-2016.

Demographics	National perinatal survey
	1995		2003		2010		2016
	aPR	95% CI	aPR	95% CI	aPR	95% CI	aPR	95% CI
Age (years)
20–24	0.79	0.74–0.83	0.68	0.63–0.73	0.58	0.53–0.64	0.48	0.42–0.55
25–29	0.89	0.85–0.92	0.86	0.82–0.90	0.75	0.71–0.80	0.71	0.66–0.77
30–35	Ref	NA	Ref	NA	Ref	NA	Ref	NA
35–39	1.04	0.99–1.10	1.19	1.13–1.25	1.20	1.13–1.28	1.20	1.12–1.29
≥ 40	1.14	1.05–1.24	1.25	1.13–1.37	1.35	1.22–1.49	1.53	1.38–1.69
Educational attainment
Primary or less	1.02	0.92–1.12	0.84	0.70–0.99	1.07	0.81–1.40	0.97	0.66–1.41
Lower second level	0.97	0.94–1.01	0.97	0.92–1.01	1.03	0.97–1.09	1.03	0.95–1.11
Higher second level	0.93	0.89–0.98	0.95	0.90–1.00	0.95	0.89–1.02	0.95	0.88–1.03
Third level	Ref	NA	Ref	NA	Ref	NA	Ref	NA
ZEAT
East	0.69	0.63–0.75	0.68	0.61–0.75	0.74	0.66–0.84	0.68	0.58–0.80
West	0.88	0.83–0.94	0.87	0.80–0.94	0.88	0.80–0.97	0.98	0.88–1.10
Centre-east	0.78	0.73–0.84	0.82	0.75–0.89	0.76	0.68–0.84	0.85	0.75–0.96
North	1.03	0.96–1.11	0.98	0.90–1.07	1.03	0.93–1.15	1.05	0.92–1.20
Paris basin	Ref	NA	Ref	NA	Ref	NA	Ref	NA
Mediterranean	1.00	0.94–1.06	1.06	0.98–1.14	1.11	1.01–1.21	1.18	1.05–1.32
South-west	1.11	1.04–1.18	1.15	1.07–1.24	1.20	1.10–1.32	1.22	1.09–1.37
Paris	1.18	1.13–1.25	1.23	1.16–1.31	1.21	1.12–1.31	1.23	1.11–1.35
Overseas departmentsa	1.16	1.04–1.29	1.28	1.16–1.41	1.38	1.22–1.55	1.63	1.43–1.86

aPR: adjusted prevalence ratio; CI: confidence interval; Ref: reference category used in the analysis; ZEAT: zones d’étude et d’aménagement du territoire (study and regional planning zone, equivalent to Nomenclature of territorial units for statistics level 1 (NUTS 1)).

Values in bold represent a significant difference p < 0.05.

^a Guadeloupe, French Guyana, La Réunion, Martinique and Mayotte combined.