Table 3

Percentage of non-cash income among tertiary and secondary centres

Variable	Tertiary centres
Variable	September–October Reference period	November–December	P value	January–February	P value	March–April	P value
Non-cash
Demonetisation periods	34.52 (16.70)	60.05 (15.46)	0.02	54.07 (16.53)	0.07	55.11 (19.41)	0.08
Control periods	30.35 (15.10)	30.74 (15.55)	0.97	31.86 (14.92)	0.86	30.63 (20.44)	0.98
	Secondary centres
Non-cash
Demonetisation periods	2.80 (4.14)	12.31 (14.46)	0.06	11.34 (12.55)	0.38	6.38 (6.02)	0.98
Control periods	1.93 (3.41)	1.89 (3.46)	0.99	1.86 (3.66)	0.43	2.00 (3.16)	0.96

Here, non-cash transactions are represented as a percentage (S.D.) of the total transactions. As there are multiple comparisons, p<0.02 is considered as significant. Only three secondary centres had non-cash facilities. The demonetisation periods were from September 2016 to April 2017 and September–October 2016 was the pre-demonetisation reference period, November–December 2016 was the early demonetisation period, January–February 2017 was the late demonetisation period and March–April 2017 was the post-demonetisation period. The control periods were taken as corresponding months from September 2015 to April 2016.