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. 2019 Dec 5;21(12):e15836. doi: 10.2196/15836

Table 2.

Generalized estimating equation analysis of the effect of the intervention on diastolic blood pressure.

Variable	Regression coefficient	SE	χ² (df)	P value
Group (intervention)^a	0.536	1.44	0.1 (1)	.71
Time (3 mo)^b	–1.586	0.83	3.6 (1)	.057
Time (6 mo)^b	0.477	1.03	0.2 (1)	.64
Group (intervention) × time (3 mo)^c	–5.442	1.21	20.4 (1)	<.001
Group (intervention) × time (6 mo)^c	–9.739	1.49	42.6 (1)	<.001

^aReference group: control group.

^bReference group: time (baseline).

^cReference group: group (control) × time (baseline).