Skip to main content

Table 2 Summary of Studies: Study Design, Sample and Quality-of-Life (QoL) Instruments

From: The impact of orthodontic treatment on the quality of life a systematic review

Author

Study design

Sample type

Sample size

Age of sample

Length of follow-up time

Qol instrument

Univariaty analysis

Evidence level

95% confidence intervals

P value

Eduardo, [21]

Case-control

Nonrandomized

837

15-16 y

Previous 6 month

CS-OIDP

0.16-0.46

p < 0.001

2C

Daniela, [14]

Longtitude

NOT mentioned

284

12-15 y

2 years

OHIP-14

p < 0.01

1B

Shoroog, 2011

Longtitude

Consecutive

118

11-14 y

More than 2 years

CPQ11-14

p < 0.01

1B

Zhijian, [15]

Longtitude

Consecutive

232

16 and older

18 month

OHIP-14 and OHQoL-UK

p < 0.01 (6 m), P < 0.01 (12 m), p < 0.05 (18 m)

1B

Man, [13]

Longtitude

Consecutive

198

13.1 ± 1.5

6 month

CPQ

p < 0.001 (first week), P < 0.05 (1 month)

1B

Mu, 2009

Longtitude

NOT mentioned

250

Mean 15, 7 y

More than 2 years

OHIP-14

p < 0.001

1B

Yueming, 2012

Longtitude

Consecutive

300

18-36 y

From begin to 6 months after posttreatment

OHIP-14

p < 0.01

1B

Andrea, 2011

Cross-sectional

Nonrandomized

579

11-14 y

-

CPQ11-14

1.11-2.33

p = 0.007

3B

Aihua, [19]

Cross-sectional

Nonrandomized

182

7-33 y

1-month post-insertion

OHIP-14

p < 0.01

3B

Nathalia, 2012

Cross-sectional

Consecutive

200

18-30 y

After treatment more than 6 month

OHIP-14

p < 0.01

3B

Oliveira, 2003

Cross-sectional

Nonrandomized

1675

15-16 y

-

OIDP and OHIP

1.30-2.62

p < 0.001

2C