Table 6:

Matching/nearest neighbor estimates-Effect of receiving a referral letter on hypertension knowledge and diet

		Knowledge				Health Behaviors
	Know about HBP	Know symptoms	Know about treatment	Extra salt to plate	Consume sweet drinks	# teaspoons sugar used in tea/coffee per day	Change in weekly MET score
			No controls
ATET	.115	.072	.056	−.018	.099	.765	−44.1
P-value	.473	.663	.714	.885	.514	.120	.100
Obs.	207	207	207	207	207	207	204
Average distance	1.21	1.21	1.21	1.21	1.21	1.21	1.23
			With controls
ATET	−.077	−.115	.009	−.213*	.067	1.30***	−77.9**
P-value	.260	.273	.920	.051	.423	.001	.005
Obs.	204	204	204	204	204	204	202
Average distance	.984	.984	.984	.984	.984	.984	.995
			With controls+SD
ATET	−.071	−.126	.09 7	−.094	−.029	.923**	−137***
P-value	.303	.193	.291	.358	.733	.010	.000
Obs.	204	204	204	204	204	204	202
Average distance	1.59	1.59	1.59	1.59	1.59	1.59	1.59

Notes: The table shows Average Treatment Effects on Treated (ATET) estimates of receiving a referral card in 2013 on knowledge about hypertension and diet in 2017 using a matching estimator. The knowledge measures are dummies based on whether they know what high blood pressure is, whether they are able to name at least one of its symptoms and whether they know that having high blood pressure required life-long treatment. Extra salt to plate and consumption of sweet drinks are dummies. We restrict the number of matches to be at least 4 and match respondents based on their mean systolic blood pressure in 2013, limiting the distance for possible matches to be at most 10. “Distance” represent the mean of the average distances between each observation and their matches. “With controls” includes a sex dummy, age and region dummies. “MET” stands for metabolic equivalent of task and it is a maeasure of physical activity.

^*p < 0.1,

^**p < 0.05,

^***p < 0.01.