Table 3. Mean difference (95% confidence interval) in diastolic blood pressure at 8 weeks and change in diastolic blood pressure in each period of gestation by hypertensive disorders of pregnancy (N=9,930)^*.

Maternal characteristics	Mean difference in DBP at 8 weeks (mmHg)	Mean difference in average DBP change (mmHg/week):
		8-18 weeks	18-30 weeks	30-36 weeks	36+ weeks
Unadjusted model:
No HDP	0	0	0	0	0
Gestational hypertension	4.692 (4.096, 5.287)	0.044 (−0.027, 0.115)	0.113 (0.069, 0.156)	0.401 (0.311, 0.491)	0.805 (0.655, 0.954)
Preeclampsia	5.470 (4.020, 6.920)	−0.007 (−0.180, 0.166)	0.220 (0.110, 0.331)	1.406 (1.170, 1.642)	2.486 (2.017, 2.956)
Essential hypertension	7.562 (6.455, 8.668)	0.061 (−0.072, 0.193)	−0.055 (−0.137, 0.028)	0.329 (0.156, 0.502)	0.274 (−0.023, 0.572)
Adjusted model:
No HDP	0	0	0	0	0
Gestational hypertension	3.799 (3.200, 4.398)	0.038 (−0.035, 0.110)	0.132 (0.088, 0.177)	0.370 (0.278, 0.461)	0.833 (0.680, 0.987)
Preeclampsia	4.674 (3.242, 6.107)	−0.028 (−0.202, 0.145)	0.239 (0.129, 0.350)	1.336 (1.099, 1.573)	2.465 (1.995, 2.935)
Essential hypertension	6.585 (5.490, 7.679)	0.056 (−0.077, 0.189)	−0.029 (−0.112, 0.054)	0.312 (0.138, 0.486)	0.333 (0.035, 0.632)

^*Both models are adjusted for time to delivery; adjusted model is additionally adjusted for maternal pre-pregnancy BMI, age, parity, smoking during pregnancy, education and sex/number of fetuses

In reference category (normotensive women):

For unadjusted model:

mean DBP at 8 weeks (mmHg) = 65.393;

mean DBP change (mmHg/week): 8-18 weeks = -0.202; 18-30 weeks = 0.091; 30-36 weeks = 0.375; 36+ weeks = 1.155

For adjusted model:

mean DBP at 8 weeks (mmHg) = 65.494;

mean DBP change (mmHg/week): 8-18 weeks = -0.175; 18-30 weeks = 0.109; 30-36 weeks = 0.463; 36+ weeks = 1.252

Abbreviations: BMI body mass index; DBP diastolic blood pressure; HDP hypertensive disorder of pregnancy