Table 1.

Classes of pelvic incidence and corresponding values of spino-pelvic positional parameters from a group control of 154 subjects [1]

	n	PI	PT
I	12	35.4 ± 1.3	3.9 ± 4.5
28° < PI < 37.9°		[33.7–37.9]	[−1.5 to 13.3]
II	44	42.7 ± 2.8	8.9 ± 4.8
38° < PI < 47.9°		[37.9–47.6]	[−5.1 to 18.2]
III	59	52.6 ± 2.8	12.5 ± 5.6
48° < PI < 57.9°		[48.2–57.4]	[−1.2 to 23.2]
IV	26	62.6 ± 2.8	15.8 ± 4.3
58° < PI < 67.9°		[58.2–67.6]	[7.1 to 26.8]
V	11	72.6 ± 2.8	19.7 ± 5.5
68° < PI < 77.9°		[69.6–77.4]	[12.6 to 27.9]
VI	2	81.4 ± 3.3	21.9 ± 12.3
78° < PI < 87.9°		[79.1–81.4]	[13.2 to 30.6]