Table 2.
Mean (SD) of key demographic and exposure variables in total population and occupation stratified populations.
| Total Population | Occupation Stratified | ||
|---|---|---|---|
| Dentists | Non-Dentists | ||
| n | 511 | 243 | 268 |
| % Female | 61.3 | 24.3 | 94.8 |
| BMI (kg/m2) | 26.4 (4.7) | 26.4 (4.0) | 26.5 (5.3) |
| Age (years) | 52.1 (12.1) | 56.1 (11.6) | 48.3 (11.2)b |
| Hours worked/ week (in past 6 months) | 27.9 (11.6) | 29.1 (11.1) | 27.0 (11.9)a |
| # Amalgam (personal) | 4.1 (4.1) | 4.6 (4.2) | 3.7 (3.9)a |
| # Amalgam placed/ week | 12.1 (25.8) | 20.4 (31.1) | 4.7 (16.7)b |
| # Amalgam removed/ week | 13.3 (23.1) | 23.2 (27.2) | 4.4 (13.4)b |
| Hg Intake (ug/kg body weight/day) | 0.08 (0.13) | 0.09 (0.14) | 0.08 (0.12) |
| Urine Hg (ug/L) | 1.04 (1.18) | 1.37 (1.3) | 0.75 (0.97)b |
| Hair Hg (ug/g) | 0.49 (0.63) | 0.69 (0.81) | 0.31 (0.33)b |
a,b
denote p-value <0.05 and <0.001, respectively, for ANOVA test comparing dentists and non-dentists. ANOVA comparing urine and hair Hg used natural log-transformed values.