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Table 1 Number of participants by age

From: Prevalence of an incompetent lip seal during growth periods throughout Japan: a large-scale, survey-based, cross-sectional study

Age

Total

Boys

Girls

3

253 (7.4)

127

126

4

350 (10.3)

172

178

5

371 (10.9)

183

188

6

403 (11.9)

207

196

7

407 (12.0)

194

213

8

405 (11.9)

187

218

9

390 (11.5)

186

204

10

340 (10.0)

161

179

11

276 (8.1)

139

137

12

204 (6.0)

105

99

Total

(n)

3399

1661

1738

(%)

100.0

48.9

51.1