Table 2. The odds ratios [OR] and 95% confidence intervals [CI] of (A) overall pregnancy-induced hypertensive disorders, (B) gestational hypertension and (C) preeclampsia in each of the four post-collapse years following the economic collapse in Iceland compared with pre-collapse period.

Regression models	Pre-collapse perioda	Post-collapse year 1b	Post-collapse year 2c	Post-collapse year 3d	Post-collapse year 4e
	OR [95% CI]	OR [95% CI]	OR [95% CI]	OR [95% CI]	OR [95% CI]
(A) Pregnancy-induced hypertensive disorders
Crude	1.00 [ref.]	1.12 [0.98–1.27]	1.01 [0.88–1.16]	1.06 [0.92–1.22]	1.04 [0.90–1.21]
Model I*	1.00 [ref.]	1.13 [0.94–1.37]	1.03 [0.82–1.30]	1.11 [0.84–1.47]	1.08 [0.78–1.50]
Model II**	1.00 [ref.]	1.13 [0.93–1.36]	1.02 [0.81–1.29]	1.10 [0.83–1.46]	1.06 [0.76–1.48]
Model III***	1.00 [ref.]	0.96 [0.74–1.23]	0.86 [0.65–1.15]	0.96 [0.70–1.31]	0.99 [0.70–1.38]
(B) Gestational hypertension
Crude	1.00 [ref.]	1.62 [1.37–1.93]	1.29 [1.06–1.56]	1.29 [1.06–1.57]	1.28 [1.04–1.57]
Model I*	1.00 [ref.]	1.47 [1.13–1.91]	1.11 [0.79–1.55]	1.09 [0.72–1.63]	1.02 [0.63–1.64]
Model II**	1.00 [ref.]	1.44 [1.11–1.87]	1.08 [0.77–1.52]	1.05 [0.69–1.58]	0.99 [0.61–1.61]
Model III***	1.00 [ref.]	1.04 [0.74–1.47]	0.78 [0.52–1.17]	0.81 [0.52–1.26]	0.85 [0.52–1.38]
(C) Preeclampsia
Crude	1.00 [ref.]	0.78 [0.65–0.94]	0.83 [0.69–1.00]	0.89 [0.74–1.07]	0.91 [0.75–1.11]
Model I*	1.00 [ref.]	0.86 [0.67–1.11]	0.97 [0.72–1.31]	1.09 [0.76–1.56]	1.15 [0.76–1.74]
Model II**	1.00 [ref.]	0.86 [0.66–1.10]	0.97 [0.71–1.31]	1.11 [0.77–1.59]	1.12 [0.73–1.72]
Model III***	1.00 [ref.]	0.88 [0.62–1.23]	0.99 [0.67–1.45]	1.11 [0.73–1.67]	1.16 [0.75–1.79]

* Adjusted for maternal age, gravidity and time in weeks [time-trend].

** Simultaneously adjusted for maternal age, gravidity, time in weeks, sex, diabetes, pre-existing hypertension, relationship status, place of residence, employment status and citizenship.

***Adjusted for maternal age, gravidity, time in weeks and aggregate unemployment rate.

Included in the collapse groups are women with singleton pregnancies with gestational length of 20 weeks or more during ^aSeptember 27^th 2004–September 28^th 2008, ^bSeptember 29^th 2008 –September 27^th 2009, ^cSeptember 28^th 2009 –October 3^rd 2010, ^dOctober 4^th 2010 –October 2^nd 2011, ^eOctober 3^rd 2011 –October 1^st 2012.