Table 1.

Sample input data table for regression analysis

	Pairs		Independent variables
Group	A	B	1	2	3	NC code
0	1	5	a	b	c	123
0	1	6	Null	b	c	23
0	–	–	–	–	–	–
2	2	3	Null	b	c	23
2	1	3	Null	b	Null	2
2	–	–	–	–	–	–