Variables

Boys N (%)

Girls N (%)

p-value^c

No. of subjects

Residential area

Municipal

Non-municipal

789

258 (32.7)

531 (67.3)

781

253 (32.4)

528 (67.6)

0.897

Education of parents

Child’s father

Primary school

Secondary school

Bachelor and higher

372 (53.5)

268 (38.6)

55 (7.9)

362 (50.8)

282 (39.6)

69 (9.6)

0.398

Child’s mother

Primary school

Secondary school

Bachelor and higher

385 (52.1)

288 (39.0)

66 (8.9)

366 (49.1)

312 (41.9)

67 (9.0)

0.491

Family income (baht/month)^a

<6000 (<183 USD)^b

6000 - 14,000 (183 - 427 USD)

>14,000 (>427 USD)

238 (30.4)

295 (37.8)

249 (31.8)

221 (28.7)

308 (40.1)

240 (31.2)

0.617