. 2018 Jun 25;17:89. doi: 10.1186/s12939-018-0799-8

Table 7.

DID estimation of Blood pressure (mmHg)

Outcome variable (y)	Baseline (1673 vs. 1673)			Follow-up (1673 vs. 1673)
Outcome variable (y)	Control $({\hat{β}}_{0})$	Intervention $({\hat{β}}_{0} + \hat{γ})$	Diff (BL) $(\hat{γ})$	Control $({\hat{β}}_{0} + {\hat{β}}_{1})$	Intervention $({\hat{β}}_{0} + {\hat{β}}_{1} + \hat{γ} + \hat{δ})$	Diff (FU) $(\hat{γ} + \hat{δ})$	DIFF-IN-DIFF $(\hat{δ})$
SBP	114.9	112.6	−2.3	114.6	109.4	−5.2	−2.9
P			0.855			0.043	0.011
DBP	197.5	197.2	0.3	203.6	196.0	−7.6	− 7.9
P			0.420			0.095	0.508