. 2017 Dec 29;50(4):265–274. doi: 10.5115/acb.2017.50.4.265

Table 2. Standard multiple regression of lesser pelvic measures on age, sex, and age-sex interaction.

Variable	B	SE B	β	t
Transverse diameter
Inlet: F(3,388)=42.011, P<0.001, R²=0.245
Age	0.084	0.023	0.165	3.631^***
Sex	−7.795	0.788	−0.441	−9.891^***
Age×Sex	−0.042	0.046	−0.041	−0.913
Midplane 1: F(3,388)=35.707, P<0.001, R²=0.217
Age	−0.003	0.024	−0.007	−0.145
Sex	−8.271	0.806	−0.467	−10.263^***
Age×Sex	0.010	0.047	0.010	0.216
Midplane 2: F(3,388)=145.881, P<0.001, R²=0.530
Age	0.067	0.026	0.091	2.541^*
Sex	−18.232	0.903	−0.710	−20.185^***
Age×Sex	0.057	0.053	0.039	1.087
Outlet: F(3,388)=144.056, P<0.001, R²=0.527
Age	−0.086	0.029	−0.106	−2.946^**
Sex	−20.877	1.005	−0.733	−20.771^***
Age×Sex	0.002	0.059	0.001	0.034
Sagittal diameter
Inlet: F(3,388)=46.808, P<0.001, R²=0.266
Age	−0.264	0.027	−0.436	−9.724^***
Sex	−6.584	0.929	−0.312	−7.090^***
Age×Sex	0.078	0.054	0.064	1.445
Midplane 1: F(3,388)=6.903, P<0.001, R²=0.051
Age	−0.061	0.028	−0.110	−2.157^*
Sex	−4.026	0.966	−0.208	−4.169^***
Age×Sex	0.023	0.056	0.021	0.411
Midplane 2: F(3,388)=19.302, P<0.001, R²=0.133
Age	−0.014	0.025	−0.029	−0.581
Sex	−6.381	0.845	−0.365	−7.548^***
Age×Sex	−0.051	0.049	−0.050	−1.031
Outlet: F(3,388)=17.466, P<0.001, R²=0.119
Age	0.126	0.025	0.245	4.990^***
Sex	−3.364	0.863	−0.188	−3.900^***
Age×Sex	−0.075	0.050	−0.072	−1.489
Pelvic indexes
Index of inlet: F(3,388)=46.607, P<0.001, R²=0.265
Age	−0.003	0.000	−0.493	−10.992^***
Sex	0.003	0.008	0.016	0.362
Age×Sex	0.001	0.000	0.073	1.639
Index of midplane 1: F(3,388)=7.631, P<0.001, R²=0.056
Age	0.000	0.000	−0.085	−1.669
Sex	0.042	0.010	0.209	4.179^***
Age×Sex	0.000	0.001	0.013	0.251
Index of midplane 2: F(3,388)=55.967, P<0.001, R²=0.307
Age	−0.001	0.000	−0.130	−2.946^**
Sex	0.147	0.012	0.515	11.898^***
Age×Sex	−0.002	0.001	−0.095	−2.174^*
Index of outlet: F(3,388)=53.705, P<0.001, R²=0.294
Age	0.002	0.000	0.242	5.498^***
Sex	0.131	0.011	0.517	11.976^***
Age×Sex	0.000	0.001	−0.015	−0.350
Pelvic angles
Sacral slope: F(3,388)=11.044, P<0.001, R²=0.079
Age	0.105	0.019	0.276	5.487^***
Sex	0.581	0.656	0.044	0.886
Age×Sex	−0.023	0.038	−0.030	−0.596
Pelvic inclination: F(3,388)=21.907, P<0.001, R²=0.148
Age	−0.129	0.019	−0.338	−6.915^***
Sex	−3.085	0.639	−0.232	−4.826^***
Age×Sex	0.010	0.037	0.013	0.272
Subpubic angle: F(3,388)=391.263, P<0.001, R²=0.753
Age	−0.249	0.034	−0.194	−7.435^***
Sex	−39.077	1.146	−0.872	−34.089^***
Age×Sex	0.029	0.067	0.011	0.435

^*P<0.05, ^**P<0.01, ^***P<0.001.