Table 3.

Bivariate analysis of sociodemographic and socioeconomic variables for schoolchildren aged 6 to 12 years in dental pain survey.

Variables	No pain n = 704 (50.1%)	Pain n = 700 (49.9%)	p value∗
Age
6-7 yrs.	210 (51.3)	199 (48.7)	0.601
8–10 yrs.	296 (48.6)	313 (51.4)
11-12 yrs.	198 (51.3)	188 (48.7)
Sex
Female	375 (53.5)	326 (46.5)	0.012
Male	329 (46.8)	374 (53.2)
Head of household
Mother	131 (54.4)	110 (45.6)	0.356
Father	537 (49.3)	553 (50.7)
Other	36 (49.3)	37 (50.7)
Mother's education level
Primary	63 (46.0)	74 (54.0)	0.103
Middle	242 (46.8)	275 (53.2)
High	260 (52.7)	233 (47.3)
Bachelor's or higher	139 (54.1)	118 (45.9)
Father's education level
Primary	56 (44.8)	69 (55.2)	0.190
Middle	168 (46.0)	197 (54.0)
High	225 (50.8)	218 (49.2)
Bachelor's or higher	226 (52.6)	204 (47.4)
Health insurance
Uninsured	235 (54.3)	198 (45.7)	0.010
IMSS/ISSSTE	358 (49.2)	369 (50.8)
PEMEX/SEDENA/SEMAR	39 (57.4)	29 (42.6)
Private	25 (51.0)	24 (49.0)
Seguro Popular	47 (37.0)	80 (63.0)
SEL (household appliances)
1st quartile	205 (58.4)	146 (41.6)	0.004
2nd quartile	170 (48.3)	182 (51.7)
3rd quartile	170 (48.4)	181 (51.6)
4th quartile	159 (45.4)	191 (54.6)
SEL (housing characteristics)
1st quartile	150 (42.1)	206 (57.9)	<0.001
2nd quartile	167 (47.2)	187 (52.8)
3rd quartile	179 (51.9)	166 (48.1)
4th quartile	208 (59.6)	141 (40.4)
Automobile in home
Yes	489 (54.8)	404 (45.2)	<0.001
No	215 (42.1)	296 (57.9)
	Mean ± sd	Mean ± sd
Mothers' age	35.47 ± 6.15	34.30 ± 5.91	0.0001 ∗∗
Fathers' age	37.97 ± 6.36	37.48 ± 6.28	0.0436 ∗∗

^∗Pearson χ² test; ^∗∗Mann-Whitney test.