Table 4.

Influence of ethnicity, altitude and maternal age in eclampsia prevalence

Variables		p-value	OR	95% CI OR
Altitudea	1500–3500	< 0.001	0.64	0.55	0.74
	> 3500	0.007	0.69	0.54	0.89
Maternal Age	MA	< 0.001	0.69	0.65	0.72
	MA2	< 0.001	1.01	1.00	1.01
Geographical Distance		< 0.001	1.30	1.26	1.33

Notes: (^a) In altitude the group of women living < 1500 mts over the sea level were considered as reference. The maternal age (MA) was included also in the quadratic form (MA²). All computation was performed including all variables in the model but were not significant as well as interactions