Table 4.
Usual mean daily amount and frequency of tea drinking among 48 582 participants in Golestan Cohort Study, Golestan, northern Iran, 2004-8. Values are percentages of participants unless stated otherwise
| Characteristics | Total No | Black tea | Green tea | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) volume (ml/day) | Frequency of consumption | Mean (SD) volume (ml/day) | Frequency of consumption | |||||||
| Daily | 1-6 days a week | Never, <weekly | Daily | 1-6 days weekly | Never, <weekly | |||||
| Total | 48 582 | 1179 (761) | 96.8 | 0.6 | 2.6 | 48 (228) | 5.8 | 4.7 | 89.5 | |
| Men | 20 649 | 1306 (869) | 97.3 | 0.5 | 2.2 | 41 (218) | 4.8 | 4.2 | 91.0 | |
| Women | 27 933 | 1085 (655) | 96.5 | 0.6 | 2.9 | 52 (235) | 6.5 | 5.2 | 88.3 | |
| Area of residence: | ||||||||||
| Urban | 9949 | 1182 (823) | 98.0 | 0.7 | 1.3 | 37 (179) | 6.0 | 7.0 | 87.0 | |
| Rural | 38 633 | 1178 (745) | 96.5 | 0.5 | 3.0 | 50 (239) | 5.7 | 4.2 | 90.1 | |
| Ethnicity: | ||||||||||
| Non-Turkmen | 12 610 | 1186 (749) | 99.0 | 0.3 | 0.7 | 6 (77) | 0.9 | 1.0 | 98.1 | |
| Turkmen | 35 972 | 1176 (765) | 96.1 | 0.6 | 3.3 | 62 (260) | 7.5 | 6.1 | 86.4 | |
| Formal education: | ||||||||||
| None | 33 990 | 1158 (720) | 96.4 | 0.5 | 3.1 | 53 (245) | 6.2 | 4.7 | 89.1 | |
| Primary school | 8253 | 1225 (813) | 97.9 | 0.5 | 1.6 | 37 (195) | 4.6 | 4.5 | 90.9 | |
| Middle school | 2205 | 1239 (884) | 97.6 | 0.8 | 1.5 | 34 (178) | 4.4 | 4.5 | 91.1 | |
| High school | 3095 | 1246 (913) | 98.0 | 0.6 | 1.4 | 31 (150) | 4.8 | 5.6 | 89.6 | |
| College or university | 1039 | 1151 (830) | 98.0 | 1.0 | 1.0 | 46 (188) | 7.4 | 7.4 | 85.2 | |