Table 2.
Characteristics of the studied subjects
| Characteristics | Calcium
|
p value | Phosphorous
|
p value | ||
|---|---|---|---|---|---|---|
| Frequency n(%)
|
Frequency n (%)
|
|||||
| low (n = 138) | high (n = 138) | low (n = 138) | high (n = 138) | |||
| Gender | ||||||
| Male | 76 (55.1) | 66 (47.8) | 0.139# | 70 (50.7) | 72 (52.2) | 0.405# |
| Female | 62 (44.9) | 72 (52.2) | 68 (49.3) | 66 (47.8) | ||
| Ethnicity | ||||||
| Caucasian | 126 (91.3) | 127 (92.0) | 0.415# | 124 (89.9) | 129 (93.5) | 0.192# |
| Afro-descendents | 12 (8.7) | 11 (8.0) | 14 (10.1) | 9 (6.5) | ||
| Age (SD) | 12.0 (0.48) | 11.9 (0.50) | 0.800* | 11.9 (0.53) | 11.9 (0.45) | 0.808* |
| Tooth brush frequency | ||||||
| Once a day | 73 (52.9) | 69 (51.1) | 0.384# | 74 (53.6) | 68 (50.4) | 0.296# |
| Two or more times a day | 65 (47.1) | 66 (48.9) | 64 (46.4) | 67 (49.6) | ||
| Use of dental floss | ||||||
| No | 48 (34.8) | 43 (31.2) | 0.627# | 51 (37.0) | 40 (29.0) | 0.134# |
| Sometimes | 66 (47.8) | 74 (53.6) | 70 (50.7) | 28 (20.3) | ||
| Yes | 24 (17.4) | 21 (15.2) | 17 (12.3) | 70 (50.7) | ||
| Ingestion of sweeties between meals | ||||||
| No | 13 (9.4) | 12 (9.6) | 0.484# | 15 (0.9) | 12 (8.1) | 0.281# |
| Yes | 125 (90.6) | 126 (90.4) | 123 (89.1) | 126 (91.9) | ||
| DMFT/dmft index (SD) | 1.31 (2.04) | 1.50 (1.77) | 0.432* | 1.36 (2.10) | 1.45 (1.70) | 0.683* |
#
Chi-square test;
*
t test.