Research Article
Analyzing Adherence to Prenatal Supplement: Does Pill Count Measure Up?
Table 1
Subject characteristics by serum 25(OH)D and adherence measurements.
| | Subject characteristic | | Baseline serum 25(OH)D, ng/mL, mean (SD) | Change in serum 25(OH)D, ng/mL, mean (SD) | CV for steady-state serum 25(OH)D measurements, mean (SD) | Mean percent adherent by pill count data, mean (SD) | Percent adherent by the novel serum 25(OH)D definition |
| | Maternal age | | | | | | | | 20 | 6 | 18.5 (10.3) | +22.4 (17.4) | 18.9% (9.0%) | 74.3% (16.6%) | 33.3% | | 20–25 | 50 | 23.2 (7.9) | +23.2 (7.9) | 17.5% (8.4%) | 81.4% (15.3%) | 46.0% | | 26–30 | 44 | 23.5 (8.7) | +23.5 (8.7) | 18.4% (8.2%) | 83.4% (12.8%) | 47.7% | | 30 | 61 | 26.6 (7.9) | +26.6 (7.9) | 17.9% (10.1%) | 84.7% (12.6%) | 47.5% | | Race | | | | | | | | Black | 32 | 17.3 (7.1) | +21.1 (13.3) | 20.4% (11.6%) | 74.8% (13.4%) | 53.1% | | Latina | 76 | 24.5 (7.6) | +18.1 (11.0) | 16.7% (8.3%) | 86.1% (13.4%) | 43.4% | | White | 53 | 28.6 (7.2) | +18.9 (10.6) | 18.2% (7.8%) | 83.2% (12.7%) | 47.2% | | Body mass index | | | | | | | | 20 | 15 | 29.5 (7.9) | +17.5 (9.6) | 16.8% (8.5%) | 90.0% (6.1%) | 33.3% | | 20–25 | 56 | 25.4 (9.3) | +18.0 (12.5) | 17.7% (9.8%) | 82.6% (11.5%) | 44.6% | | 26–30 | 39 | 23.0 (7.8) | +22.4 (11.9) | 17.2% (7.6%) | 86.0% (10.5%) | 53.8% | | 30 | 40 | 23.3 (7.5) | +18.2 (9.8) | 19.2% (8.1%) | 80.3% (16.0%) | 47.5% | | Season at enrollment | | | | | | | | Winter | 34 | 24.3 (8.4) | +20.2 (12.2) | 16.9% (9.4%) | 83.4% (12.6%) | 50.0% | | Spring | 53 | 22.6 (7.8) | +20.1 (10.9) | 18.8% (10.7%) | 83.7% (15.9%) | 43.4% | | Summer | 40 | 25.2 (7.3) | +17.2 (11.2) | 17.7% (7.3%) | 84.5% (12.3%) | 40.0% | | Fall | 34 | 26.5 (9.9) | +18.2 (11.5) | 17.9% (7.4%) | 79.4% (12.7%) | 55.9% | | Dose | | | | | | | | 2000 IU | 85 | 24.5 (8.7) | +15.5 (10.7) | 18.5% (8.9%) | 82.3% (13.3%) | 37.6% | | 4000 IU | 76 | 24.4 (8.0) | +22.9 (10.8) | 17.2% (9.1%) | 83.6% (14.3%) | 56.6% | | Adherence by pill count | | | | | | | | 70% | 25 | 25.7 (9.8) | +13.8 (10.1) | 17.4% (9.0%) | 57.8% (12.0%) | 40.0% | | 70% | 136 | 24.2 (8.1) | +20.0 (11.4) | 18.0% (9.0%) | 87.5% (7.8%) | 47.8% | | All subjects | 161 | 24.4 (8.4) | +19.0 (11.4) | 17.9% (9.0%) | 82.9% (13.7%) | 46.6% |
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