Table 4 |
||||
|
Preterm delivery results for daily bottled, cold tap, total tap, and total water intake |
||||
|
Follow-up data |
Average of baseline and follow-up data |
|||
|
|
||||
|
Exposure |
n (%) |
Unadjusted RR (95% CI) |
Adjusted RR (95% CI)a |
Adjusted RR (95% CI)a |
|
|
||||
|
Bottled water |
||||
|
None |
483 (25%) |
1 |
1 |
1 |
|
Any |
1458 (75%) |
1.2 (0.9, 1.8) |
1.2 (0.8, 1.8) |
0.8 (0.5, 1.4) |
|
Cold tap water (ounces)b |
||||
|
0-27 |
472 (24%) |
1 |
1 |
1 |
|
> 27-53 |
494 (25%) |
0.8 (0.5, 1.2) |
0.8 (0.5, 1.3) |
0.9 (0.6, 1.4) |
|
> 53-91 |
485 (25%) |
0.9 (0.6, 1.3) |
0.9 (0.6, 1.4) |
0.9 (0.6, 1.4) |
|
> 91 |
490 (25%) |
0.8 (0.5, 1.1) |
0.8 (0.5, 1.3) |
1.0 (0.6, 1.5) |
|
Per 20 ounce |
1.0 (0.9, 1.0) |
0.9 (0.7, 1.3) |
0.9 (0.6, 1.3) |
|
|
Total tap water (ounces)b |
||||
|
0-30 |
493 (25%) |
1 |
1 |
1 |
|
> 30-61 |
483 (25%) |
0.8 (0.5, 1.2) |
0.8 (0.5, 1.2) |
1.0 (0.6, 1.5) |
|
> 61-96 |
535 (28%) |
0.7 (0.5, 1.1) |
0.8 (0.5, 1.2) |
1.2 (0.8, 1.9) |
|
> 96 |
429 (22%) |
0.9 (0.6, 1.3) |
1.0 (0.6, 1.5) |
0.9 (0.6, 1.4) |
|
Per 20 ounce |
1.0 (0.9, 1.0) |
0.9 (0.7, 1.2) |
0.9 (0.6, 1.3) |
|
|
Total water (ounces)b |
||||
|
0-51 |
491 (25%) |
1.0 |
1.0 |
1.0 |
|
> 51-78 |
478 (25%) |
1.0 (0.7, 1.6) |
1.2 (0.7, 1.9) |
1.1 (0.7, 1.7) |
|
> 78-114 |
481 (25%) |
1.0 (0.7, 1.6) |
1.1 (0.7, 1.8) |
1.0 (0.6, 1.5) |
|
> 114 |
478 (25%) |
1.2 (0.8, 1.8) |
1.4 (0.9, 2.2) |
1.2 (0.8, 1.9) |
|
Per 20 ounce |
1.0 (1.0, 1.1) |
1.1 (0.9, 1.4) |
1.1 (0.8, 1.5) |
|
|
|
||||
|
aAdjusted for race, education level, annual household income, smoking, pre-pregnancy BMI, vitamin use, parity, employed during last 4 months, infant gender, and study site bCategorical exposure cutpoints for average data results were slightly higher than the follow-up data BMI= body mass index; RR= risk ratio |
||||
|
Wright et al. BMC Pregnancy and Childbirth 2010 10:48 doi:10.1186/1471-2393-10-48 |
||||
