Discrepancy index, treatment complexity index and objective Grading system: correlation between parameters, indices and implications for treatment

Items		OJ	OB	AOB	LOB	Cr	OcR	LgPCB	BcPCB	Ceph
OB	CC	0.533
	P value	<0.001**
AOB	CC	-0.042	-0.307
	P value	0.521	<0.001**
LOB	CC	-0.072	-0.073	0.177
	P value	0.267	0.261	0.006**
Cr	CC	-0.156	-0.140	0.181	0.03
	P value	0.015*	0.030*	0.005**	0.645
OcR	CC	0.127	-0.053	-0.12	0.082	-0.025
	P value	0.049*	0.412	0.062	0.204	0.699
LgPCB	CC	-0.008	-0.11	0.064	0.081	0.206	0.077
	P value	0.904	0.090	0.322	0.214	0.001**	0.234
BcPCB	CC	-0.113	-0.112	0.057	0.042	0.077	0.079	0.053
	P value	0.080	0.083	0.382	0.514	0.238	0.223	0.412
Ceph	CC	0.077	0.094	0.087	0.019	-0.079	-0.098	0.011	-0.08
	P value	0.232	0.145	0.180	0.767	0.220	0.130	0.866	0.216
Ot	CC	-0.055	-0.026	-0.091	0.065	-0.105	0.054	0.048	0.076	-0.041
	P value	0.398	0.686	0.161	0.312	0.105	0.402	0.458	0.238	0.526

1** p < 0.01 level (2-tailed);

1* p < 0.05 level (2-tailed).

1 AOB, Anterior open bite; BcPCB, Buccal posterior crossbite; CC, Correlation coefficient; Ceph, Cephalometrics; Cr, Crowding; LgPCB, Lingual posterior crossbite; OcR Occlusal relationship; Ot, Others; OB, Overbite; OJ, Overjet; OcR Occlusal relationship.

Table II.

Correlation (ρ) of Pre-OGS Items

Items		Align	MargRid	BcLgInc	Ojet	OcCont	OcRel	IPCont
MargRid	CC	0.269
	P value	<0.001**
BcLgInc	CC	0.071	0.241
	P value	0.274	<0.001**
Ojet	CC	0.039	0.203	0.051
	P value	0.546	0.002**	0.432
OcCont	CC	0.057	0.153	0.113	0.182
	P value	0.380	0.018*	0.081	0.005**
OcRel	CC	0.148	0.241	0.105	0.271	0.139
	P value	0.022*	<0.001**	0.104	<0.001**	0.032*
IPCont	CC	-0.301	0.085	0.000	0.077	0.087	-0.061
	P value	<0.001**	0.189	0.995	0.234	0.180	0.345
RtAng	CC	0.347	0.083	0.119	0.158	0.119	0.174	-0.184
	P value	<0.001**	0.198	0.066	0.014*	0.067	0.007**	0.004**

1** p < 0.01 level (2-tailed);

1* p < 0.05 level (2-tailed).

1 Align, Alignment; BcLgInc, Buccal lingual inclination; CC, Correlation coefficient; IpCont, Interproximal contact; MargRid, Marginal ridge; OcCont, Occlusal contact; OcRel, Occlusal relationship; OJ, Overjet; RtAng, Root angulation.

Table III.

Correlation (ρ) of Treatment Complexity Index Items

Items		Hg	RFA	4QE	SurgE	OSurg	RPE	OIA
RFA	CC	-0.033
	P value	0.610
4QE	CC	0.055	-0.097
	P value	0.396	0.133
SurgE	CC	-0.012	-0.039	0.027
	P value	0.853	0.543	0.682
OS	CC	-0.011	0.270	-0.087	-0.032
	P value	0.863	0.000**	0.179	0.620
RPE	CC	-0.024	0.180	0.084	-0.07	-0.066
	P value	0.706	0.005**	0.197	0.279	0.312
OIA	CC	-0.007	0.033	-0.046	-0.021	-0.019	-0.043
	P value	0.911	0.606	0.478	0.747	0.764	0.512
M	CC	-0.032	0.221	0.249	0.028	0.128*	-0.074	-0.038
	P value	0.618	0.001**	0.000**	0.699	0.047	0.257	0.563

1** p < 0.01 level (2-tailed);

1* p < 0.05 level (2-tailed).

1 4QE, Four quadrant extraction; CC, Correlation coefficient; Hg, Headgear; M, Multidisciplinary; OSurg, Orthognathic surgery; RFA, Removable functional appliance; RPE, Rapid palatal expansion; SurgE, Surgical exposure; TADs, Temporary anchorage device.

Table IV.

Correlation (ρ) for DI, TCI and PreOGS total score

Index		DI	TCI
TCI	CC	0.008
	P value	0.905
PreOGS	CC	0.397	0.144
	P value	<0.001**	0.026*

1** p < 0.01 level (2-tailed);

1* p < 0.05 level (2-tailed).

1 CC, Correlation coefficient; DI; Discrepancy index; Pre-OGS; Pre objective grading system; TCI; treatment complexity index.

Table V.

Association Between The Items in DI and The Treatment Outcome (Post-OGS)

	Unstandardized Coefficients		Standardized Coefficients	t	P value
Items	Beta	Standard Error	Beta	t	P value
Constant	15.454	3.950		3.913	<0.001**
OJ	0.816	0.601	0.106	1.358	0.176
OB	0.110	0.530	0.017	0.209	0.835
AOB	0.189	0.520	0.025	0.363	0.717
LOB	0.504	0.441	0.073	1.142	0.255
Cr	0.634	0.330	0.131	1.922	0.056
OcR	0.412	0.363	0.074	1.134	0.258
LgPCB	-0.661	1.127	-0.039	-0.587	0.558
BcPCB	1.569	1.298	0.078	1.209	0.228
Ceph	0.456	0.145	0.205	3.142	0.002**
Ot	0.378	0.174	0.141	2.175	0.031*

1** p < 0.01 level (2-tailed), );

1* p < 0.05 level (2-tailed).

1 AOB, Anterior open bite; BcPCB, Buccal posterior crossbite; Ceph, Cephalometrics; Cr, Crowding; OcR Occlusal relationship; LgPCB, Lingual posterior crossbite; OB, Overbite; OJ, Overjet; Ot; Others.

Table VI.

Association between the items in TCI and the treatment duration exceeding two years

Items	Beta	Standard Error	Wald	P value
Hg	21.249	40192.970	0.000	1.000
RFA	0.509	0.338	2.270	0.132
4QE	0.285	0.250	1.300	0.254
SurgE	0.204	0.499	0.167	0.683
OSurg	0.831	0.768	1.172	0.279
RPE	1.140	0.465	6.003	0.014*
TADs	0.786	1.254	0.393	0.531
M	-0.077	0.228	0.113	0.737
Constant	-0.255	0.307	0.688	0.407

1* p < 0.05 level (2-tailed).

1 4QE, Four quadrant extraction; Hg, Headgear; M, Multidisciplinary; OSurg, Orthognathic surgery; RFA, Removable functional appliance; RPE, Rapid palatal expansion; SurgE, Surgical exposure; TADs, Temporary anchorage device.

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DOI: https://doi.org/10.2478/aoj-2024-0016 | Journal eISSN: 2207-7480 | Journal ISSN: 2207-7472

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Language: English

Page range: 9 - 18

Submitted on: Feb 1, 2024

Accepted on: Jun 1, 2024

Published on: Jul 17, 2024

Published by: Australian Society of Orthodontists Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Related subjects:

Medicine,

Basic medical science,

Basic medical science, other

© 2024 Alizae Marny Fadzlin Syed Mohamed, Nurul Naziha Yusop, Nurul Sabryna Rasidi, Asma Ashari, Amy Liew Kia Cheen, published by Australian Society of Orthodontists Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 40 (2024): Issue 2 (July 2024)