Table 3.
Circulating L ascorbic acid levels by levels of continuous and binary confounding factors in the British Women’s Heart and Health Study
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|---|---|---|---|---|---|
| Mean (95%CI) L-ascorbic acid | |||||
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| Confounder | n | Tertile 1 | Tertile 2 | Tertile 3 | p |
| SEP | 2968 | 49.33 (47.71, 50.94) |
42.72 (41.15, 44.29) |
36.50 (34.26, 38.74) |
2.8×10−20 |
| Latitude (m) | 3404 | 46.43 (44.82, 48.05) |
39.08 (37.43, 40.74) |
43.16 (41.58, 44.74) |
0.006 |
| Longitude (m) | 3404 | 40.89 (39.32, 42.45) |
44.23 (42.66, 45.80) |
43.95 (42.20, 45.70) |
0.007 |
|
| |||||
| Mean (95%CI) L-ascorbic acid | |||||
|
| |||||
| Confounder | n | No | Yes | p | |
|
| |||||
| <1hr vigorous activity/wk |
2972 | 43.56 (42.45, 44.67) |
41.24 (38.93, .55) |
0.08 | |
| < 2 drinks/day | 3281 | 42.09 (41.04, 43.14) |
49.49 (47.31, 51.67) |
2.2×10−09 | |
| Parental Cardiovascular disease |
3320 | 43.54 (42.19, 44.89) |
43.89 (42.54, 45.25) |
0.7 | |
| Hormone replacement therapy |
3397 | 43.06 (41.98, 44.14) |
45.94 (43.85, 48.04) |
0.02 | |
| Current smoker |
3590 | 44.67 (43.71, 45.64) |
32.47 (29.71, 35.22) |
3.4e-16 | |
Mean (95%CI) L ascorbic acid levels by continuous and binary confounding variables.
SEP denotes socioeconomic position score.
Tests of difference by confounder levels were derived from linear regression.