Table 7.

The Bolton ratios in men, women, and different Angle classes.

Bolton ratio	Variables	N	Mean	SD	95% CI		Min	Max	P
Overall	Female	210	91.78	2.48	91.44	92.12	83.97	99.09	0.229
	Male	58	92.22	2.42	91.58	92.85	86.32	99.87
	Total	268	91.87	2.47	91.58	92.17	83.97	99.87
Anterior	Female	210	77.86	3.11	77.44	78.29	69.00	89.43	0.059
	Male	58	78.74	3.02	77.94	79.53	71.45	87.61
	Total	268	78.05	3.11	77.68	78.43	69.00	89.43
Posterior	Female	210	105.42	3.77	104.91	105.93	96.20	114.43	0.995
	Male	58	105.41	3.83	104.41	106.42	97.14	115.59
	Total	268	105.42	3.77	104.96	105.87	96.20	115.59
Overall	Class I	142	91.96	2.43	91.56	92.37	86.32	99.09	0.083
	Class II	110	91.55	2.41	91.10	92.01	83.97	99.87
	Class III	13	93.03	2.50	91.52	94.54	88.94	97.73
Anterior	Class I	142	77.90	2.98	77.41	78.40	71.45	86.06	0.667
	Class II	110	78.16	3.30	77.54	78.79	69.00	89.43
	Class III	13	78.56	2.96	76.77	80.35	74.48	85.40
Posterior	Class I	142	105.80	3.64	105.19	106.40	96.78	112.49	0.008
	Class II	110	104.60	3.69	103.90	105.30	96.20	115.59
	Class III	13	107.19	4.16	104.67	109.70	100.42	112.31

SD: standard deviation; CI: confidence interval; Min: minimum; Max: maximum. The P values for comparisons between men and women are calculated using the unpaired t-test. The P values for comparisons across Angle classes are calculated using the one-way ANOVA.