Figure 2
From: Surveillance of salivary properties of pre-orthodontic patients in relation to age and sex
Correlation with age. Correlation between the scores of (a) PCR, (b) Saliva flow rate, (c) pH, (d) Buffering capability, (e) Streptococcus mutans score, and (f) Lactobacillus spp. score and subject’s age using the Spearman’s rank correlation coefficient. Each dot represents a subject, and the linear regression is shown by a solid line. The values of the correlation coefficient are shown as (ρ) and significant differences are indicated as *p < 0.05, **p < 0.01 and ***p < 0.001. PCR, plaque control record.
