Table 1 Frequency of clinical variables according to socio-demographic data of preschool children analysed

Sex

Female

125 (30.7)^A

82 (20.1)^A

200 (49.1)^A

275 (67.9)^A

130 (32.1)^A

141 (34.8)^A

264 (65.2)^A

Male

158 (36.2)^A

76 (17.4)^A

202 (46.3)^A

278 (64.1)^A

156 (35.9)^A

152 (35.0)^A

282 (65.0)^A

Age

3 years

107 (38.9)^A

61 (22.2)^A

107 (38.9)^B

176 (64.0)^A

99 (36.0)^A

85 (30.9)^A

190 (69.1)^A

4 years

103 (30.8)^A

69 (20.7)^A

162 (48.5)^B

226 (68.2)^A

106 (31.9)^A

115 (34.6)^A

217 (65.4)^A

5 years

73 (31.1)^A

28 (12.0)^A

133 (56.8)^B

151 (65.1)^A

81 (34.9)^A

93 (40.1)^A

139 (59.9)^A

Type of preschool

Public

111 (24.3)^A

78 (17.1)^A

267 (58.6)^B

305 (67.3)^A

148 (32.7)^A

163 (36.0)^A

290 (64.0)^A

Private

172 (44.4)^A

80 (20.7)^A

135 (34.9)^B

248 (64.2)^A

138 (35.8)^A

130 (33.7)^A

256 (66.3)^A

Mother’s schooling

≤ 8 years of study

100 (25.8)^A

46 (11.9)^A

242 (62.4)^B

262 (68.1)^A

123 (31.9)^A

133 (34.5)^A

252 (65.5)^A

> 8 years of study

183 (40.5)^A

111 (24.6)^A

158 (35.0)^B

289 (64.1)^A

162 (35.9)^A

160 (35.5)^A

291 (64.5)^A

Monthly household income

≤ 1 minimum salary

108 (24.4)^A

64 (14.5)^A

270 (61.1)^B

299 (68.0)^A

141 (32.0)^A

166 (37.7)^A

274 (62.3)^A

> 1 minimum salary

157 (43.4)^A

84 (23.2)^A

121 (33.4)^B

229 (63.6)^A

131 (36.4)^A

113 (31.4)^A

247 (68.6)^A

TOTAL

283 (33.6)

158 (18.7)

402 (47.7)

553 (65.9)

286 (34.1)

293 (34.9)

546 (65.1)