Table 2.

Comparison between left and right sides in each subgroup.

Variables	Groups	Side	Mean	SD	95% CI		p value
					Lower	Upper
Age, years	<18	Left	265.041	199.318	−67.231	−8.565	0.012
		Right	302.939	195.930
	>18	Left	469.118	89.063	−63.048	−16.599	0.001
		Right	508.941	69.986
Sex	Female	Left	269.571	198.852	−86.312	−28.014	0.000
		Right	326.735	195.270
	Male	Left	464.765	99.413	−43.644	1.016	0.061
		Right	486.078	116.900
Lip competency	Competent	Left	387.615	187.903	−81.502	−33.229	0.000
		Right	444.981	172.343
	Incompetent	Left	349.083	179.038	−46.344	8.636	0.174
		Right	367.938	177.757
Midline shift	No shift	Left	495.838	83.630	−48.697	−14.385	0.001
		Right	527.378	97.262
	Shift	Left	294.698	186.196	−70.763	−15.618	0.003
		Right	337.889	178.277
Dental malocclusion	Class I	Left	477.878	132.246	−37.754	−2.392	0.027
		Right	497.951	133.264
	Class II	Left	379.241	179.387	−115.515	−32.416	0.001
		Right	453.207	157.243
	Class III	Left	210.700	131.683	−70.487	9.153	0.126
		Right	241.367	134.083
Skeletal malocclusion	Class I	Left	451.682	112.198	−57.603	−2.079	0.036
		Right	481.523	96.285
	Class II	Left	328.586	196.275	−77.475	−4.525	0.029
		Right	369.586	213.149
	Class III	Left	278.111	210.597	−87.531	−15.136	0.007
		Right	329.444	199.041
Overjet	Normal	Left	458.861	104.326	−70.453	−8.214	0.015
		Right	498.194	71.300
	Increased	Left	326.394	187.771	−71.773	−3.864	0.030
		Right	364.212	208.367
	Decreased	Left	310.387	214.321	−73.105	−5.863	0.023
		Right	349.871	193.210
Overbite	Normal	Left	440.333	142.403	−59.177	−21.156	0.000
		Right	480.500	139.958
	Increased	Left	211.667	115.028	−105.592	−11.297	0.017
		Right	270.111	139.523
	Decreased	Left	409.774	202.917	−56.677	16.483	0.271
		Right	429.871	190.600
Crowding	Mild	Left	452.023	120.873	−56.824	−6.013	0.017
		Right	483.442	113.592
	Moderate	Left	237.160	156.252	−112.196	−44.764	0.000
		Right	315.640	158.021
	Severe	Left	360.813	213.393	−55.709	19.772	0.339
		Right	378.781	221.543

SD, standard deviation; CI, confidence interval.