Table 3.

Simulated post-op. values of 3D descriptors (MT Cobb, TK and MT AVR) for each of ten thoracic cases and for each simulated screw pattern

Patient	3D descriptor (°)	Screw pattern / ID					Avg ± SD	[min; max]	max–min
		A / 1.2	PAD / 1.4	CA / 1.6	CPAD /1.7	B / 2
#1	MT Cobb	24	24	23	22	22	23 ± 1	[22; 24]	1.9
	TK	17	17	18	18	18	18 ± 0	[17; 18]	1.0
	AVR	1	1	1	1	1	1 ± 0	[1; 1]	0.4
#2	MT Cobb	22	22	19	19	20	20 ± 2	[19; 22]	3.8*
	TK	33	31	32	32	32	32 ± 0	[31; 33]	1.3
	AVR	− 3	1	− 1	0	0	− 1 ± 1	[− 3; 1]	3.8*
#3	MT Cobb	18	17	16	16	15	16 ± 1	[15; 18]	2.7
	TK	19	19	20	19	19	19 ± 0	[19; 20]	1.3
	AVR	− 5	− 1	− 2	− 1	− 1	− 2 ± 2	[− 5; − 1]	3.9*
#4	MT Cobb	19	18	17	17	17	18 ± 1	[17; 19]	2.7
	TK	18	15	17	17	17	17 ± 1	[15; 18]	3.2*
	AVR	− 11	− 10	− 11	− 10	− 11	− 11 ± 1	[− 11; − 10]	1.3
#5	MT Cobb	28	29	27	26	27	27 ± 1	[26; 29]	2.2
	TK	35	37	35	36	36	36 ± 1	[35; 37]	1.8
	AVR	− 11	− 13	− 11	− 13	− 12	− 12 ± 1	[− 13; − 11]	1.8
#6	MT Cobb	24	22	18	18	17	20 ± 3	[17; 24]	6.6**
	TK	39	41	34	36	36	37 ± 3	[34; 41]	7.4**
	AVR	5	6	7	8	8	7 ± 1	[5; 8]	3.5*
#7	MT Cobb	27	25	25	25	25	26 ± 1	[25; 27]	2.5
	TK	43	43	42	42	42	42 ± 1	[42; 43]	1.3
	AVR	− 14	− 11	− 11	− 11	− 11	− 12 ± 1	[− 14; − 11]	2.7
#8	MT Cobb	27	25	24	24	24	25 ± 1	[24; 27]	3.2*
	TK	35	35	34	34	34	35 ± 0	[34; 35]	1.1
	AVR	− 1	3	2	3	3	2 ± 2	[− 1; 3]	4.2*
#9	MT Cobb	23	21	20	19	20	20 ± 1	[19; 23]	3.3*
	TK	30	31	30	30	30	30 ± 0	[30; 31]	0.9
	AVR	− 6	− 5	− 4	− 4	− 4	− 5 ± 1	[− 6; − 4]	2.5
#10	MT Cobb	19	18	18	18	21	19 ± 1	[18; 21]	2.2
	TK	51	51	50	50	50	50 ± 1	[50; 51]	1.9
	AVR	− 6	− 2	− 3	− 2	− 2	− 3 ± 2	[− 6; − 2]	3.8*

Their variability is expressed as average (Avg) ± standard deviation (SD) with range (Max–min). The double asterisk ("**") indicates the maximum variability of 3D descriptors, while a single asterisk ("*") indicates when the variability is greater than the average value calculated over all ten cases