Spearman correlation coefficients for the same variables in the questionnaire and seven day diary, and the average differences between the questionnaire and seven day diary (n = 47)
| Variables (questionnaire versus seven day diary) | Spearman correlation coefficient | Average of differences between the two methods (%) | |
|---|---|---|---|
| *Correlation is significant at the 0.05 level (two tailed). | |||
| **Correlation is significant at the 0.01 level (two tailed). | |||
| Boiling water (min/week) | 0.46** | 60.81 | (26.01) |
| Washing up (min/week) | 0.50** | 23.45 | (16.91) |
| Dishwasher (min/week) | 0.82** | 29.43 | (6.48) |
| Total time (min/week) washing up | 0.68** | 113.68 | (23.57) |
| Showering (min/week) | 0.80** | −12.43 | (−8.74) |
| After showering in bathroom (min/week) | 0.80** | 3.45 | (−1.86) |
| Bathing (min/week) | 0.76** | 6.87 | (13.31) |
| After bathing in bathroom (min/week) | 0.76** | −1.70 | (10.26) |
| Total time showering, bathing, and in bathroom (min/week) | 0.58** | −3.81 | (1.27) |
| Swimming (min/month) | 0.72** | −60.00 | (−21.49) |
| Overall total exposure from cooking and washing up, personal washing, and swimming (min/week) | 0.76** | 112.03 | (13.49) |
| Tap water (home) (l/week) | 0.79** | 0.62 | (11.67) |
| Tap water (work and elsewhere) (l/week) | 0.43** | 0.87 | (−0.09) |
| Total tap water (l/week) | 0.77** | 1.44 | (13.05) |
| Bottled water (home) (l/week) | 0.70** | 0.66 | (3.23) |
| Bottled water (work and elsewhere) (l/week) | 0.55** | 0.91 | (−0.16) |
| Total bottled water (l/week) | 0.71** | 1.55 | (5.71) |
| Hot beverages (home) (l/week) | 0.68** | 0.48 | (13.32) |
| Hot beverages (work/elsewhere) (l/week) | 0.66* | 0.52 | (−2.01) |
| Total hot beverages (l/week) | 0.77** | 0.99 | (15.32) |
| Milk (home) (l/week) | 0.51** | 0.15 | (6.83) |
| Milk (work and elsewhere) (l/week) | −0.8 | −0.09 | (−8.51) |
| Total milk (l/week) | 0.60** | 0.10 | (−0.79) |
| Squash (home) (l/week) | 0.52** | 0.33 | (−2.08) |
| Squash (work and elsewhere) (l/week) | 0.27 | −0.10 | (−18.35) |
| Total squash (l/week) | 0.49** | 0.22 | (−11.74) |
| Soft drinks (home) (l/week) | 0.32* | −0.56 | (−21.70) |
| Soft drinks (work and elsewhere) (l/week) | 0.22 | −0.20 | (−25.79) |
| Total soft drinks (l/week) | 0.52** | −0.73 | (−31.14) |
| Alcoholic beverages (home) (l/week) | 0.53** | 0.08 | (16.31) |
| Alcoholic beverages (work and elsewhere) (l/week) | 0.26 | −0.11 | (−21.13) |
| Total alcoholic beverages (l/week) | 0.69** | −0.03 | (−2.26) |
| Soup (home) (l/week) | 0.38** | 0.02 | (−17.20) |
| Soup (work and elsewhere) (l/week) | 0.30* | 0.00 | (5.47) |
| Total soup (l/week) | 0.31* | 0.11 | (10.45) |
| Total fluid intake at home (l/week) | 0.46** | 1.80 | (7.67) |
| Total fluid intake at work and elsewhere (l/week) | 0.66** | 1.79 | (0.04) |
| Overall total fluid intake (l/week) | 0.55** | 3.59 | (8.30) |