Table 6.
Agreement between tea temperature variables among 48 582 participants in Golestan Cohort Study, Golestan, northern Iran, 2004-8
| Descriptive variables | Measured temperatures | Weighted κ statistic (SE) | Spearman’s rank correlation coefficient (P value) | ||
|---|---|---|---|---|---|
| <65°C | 65-69°C | ≥70°C | |||
| Tea temperature: | |||||
| Warm or lukewarm | 32 414 | 3749 | 467 | 0.49 (0.005) | 0.46 (<0.001) |
| Hot | 5385 | 4246 | 1757 | ||
| Very hot | 37 | 48 | 421 | ||
| Interval between tea being poured and drunk (minutes) | |||||
| ≥4 | 30 259 | 4678 | 675 | 0.39 (0.005) | 0.32 (<0.001) |
| 2-3 | 6836 | 2691 | 859 | ||
| <2 | 741 | 674 | 1111 | ||
Participants who did not drink tea were not included in these analyses, therefore total number of participants is 48 524.