Table 2.
Associations between caffeinated beverages with antral follicle count among 567 women in the EARTH Study.
| Servings per day, range | n | Unadjusted | Adjusted mean (95% CI) |
|
|---|---|---|---|---|
| Age and total energy | Multivariable1 | |||
|
| ||||
| Caffeinated beverages (total) | ||||
| Q1 (0, 0.45) | 141 | 14.2 (13.6–14.9) | 13.7 (13.1–14.4) | 13.8 (12.9–14.7) |
| Q2 (0.46, 1.08) | 148 | 14.1 (13.5–14.7) | 13.7 (13.1–14.3) | 13.5 (12.7–14.4) |
| Q3 (1.10, 2.14) | 132 | 14.3 (13.7–15.0) | 13.8 (13.2–14.4) | 13.9 (13.0–14.7) |
| Q4 (2.50, 7.08) | 146 | 13.4 (12.8–14.0) | 13.7 (13.1–14.4) | 13.8 (13.0–14.7) |
| P-trend | 0.04 | 0.98 | 0.85 | |
| Coffee with caffeine | ||||
| Q1 (0, 0.02) | 140 | 14.1 (13.5–14.7) | 13.6 (13–14.2) | 13.5 (12.7–14.4) |
| Q2 (0.03, 0.43) | 167 | 14.2 (13.7–14.8) | 13.9 (13.3–14.5) | 14.0 (13.1–14.8) |
| Q3 (0.8, 1.00) | 160 | 13.9 (13.3–14.5) | 13.5 (13.0–14.1) | 13.5 (12.7–14.4) |
| Q4 (2.50, 6.00) | 100 | 13.6 (12.9–14.4) | 13.9 (13.2–14.7) | 13.9 (13.0–14.9) |
| P-trend | 0.20 | 0.84 | 0.81 | |
| Decaffeinated coffee | ||||
| M1/None (0, 0) | 307 | 14.1 (13.7–14.6) | 13.7 (13.3–14.1) | 13.6 (12.9–14.3) |
| M2/Any (0.02, 4.50) | 260 | 13.8 (13.4–14.3) | 13.8 (13.3–14.2) | 13.9 (13.1–14.7) |
| P-value | 0.79 | 0.79 | 0.35 | |
| Tea with caffeine | ||||
| T1 (0, 0.03) | 207 | 13.9 (13.4–14.4) | 13.6 (13.1–14.1) | 13.5 (12.8–14.3) |
| T2 (0.08, 0.14) | 156 | 15.0 (14.4–15.6)* | 14.4 (13.8–15.0)* | 14.6 (13.7–15.5)* |
| T3 (0.43, 6.00) | 204 | 13.3 (12.8–13.8) | 13.3 (12.8–13.9) | 13.3 (12.6–14.2) |
| P-trend | 0.002 | 0.08 | 0.09 | |
| Decaffeinated/herbal tea | ||||
| T1 (0, 0.03) | 181 | 14.1 (13.6–14.6) | 13.5 (13.0–14.1) | 13.5 (12.7–14.3) |
| T2 (0.08, 0.14) | 158 | 14.5 (13.9–15.1) | 14.2 (13.7–14.8) | 14.2 (13.3–15.1) |
| T3 (0.43, 6.00) | 228 | 13.6 (13.1–14.1) | 13.5 (13.1–14.0) | 13.7 (12.9–14.5) |
| P-trend | 0.04 | 0.38 | 0.73 | |
| Caffeinated soda | ||||
| T1 (0, 0) | 283 | 13.6 (13.1–14.0) | 13.5 (13.1–14.0) | 13.6 (12.9–14.3) |
| T2 (0.02, 0.02) | 105 | 14.3 (13.6–15.0) | 13.8 (13.1–14.5) | 13.9 (13.0–14.9) |
| T3 (0.04, 4.00) | 179 | 14.5 (14.0–15.1)* | 14.0 (13.4–14.5) | 13.9 (13.1–14.8) |
| P-trend | 0.01 | 0.27 | 0.52 | |
| Decaffeinated soda | ||||
| T1 (0, 0.02) | 241 | 13.4 (12.9–13.8) | 13.5 (13.0–13.9) | 13.5 (12.8–14.3) |
| T2 (0.04, 0.08) | 133 | 15.2 (14.6–15.9)* | 14.6 (14.0–15.3)* | 14.6 (13.7–15.6)* |
| T3 (0.10, 4.80) | 193 | 14.0 (13.4–14.5) | 13.5 (13.0–14.0) | 13.5 (12.7–14.3) |
| P-trend | 0.10 | 0.91 | 0.80 | |
1
Adjusted for age, body mass index, smoking status, race, physical activity, education, total energy intake, the remaining beverages and the dietary patterns without the specific beverages.
Q: quartiles. T: tertiles. M: median.
*
P <0.05 for comparison of specific category vs category 1 (reference).