Table 4.
Comparison of pre- to post-bowel preparation laboratory values.
| 95% Confidence Interval |
||||||||
|---|---|---|---|---|---|---|---|---|
| Lab | n | Normal range | Pre-prep (SD) | Post-prep (SD) | Difference (SD) | Lower | Upper | P-Value |
| Na (mEq/L) | 48 | 133–145 | 137.6 (4.1) | 137.7 (3.5) | 0.17 (3.6) | –0.9 | 1.2 | 0.75 |
| K (mEq/L) | 48 | 3.3–5.1 | 4.2 (0.4) | 4.1 (0.5) | –0.12 (0.48) | –0.26 | 0.02 | 0.08 |
| Cl (mEq/L) | 48 | 96–108 | 99.8 (3.7) | 99.6 (3.3) | –0.25 (3.3) | –1.2 | 0.72 | 0.61 |
| CO2 (mEq/L) | 48 | 22–29 | 26.5 (3.6) | 27.3 (3.3) | –0.73 (2.9) | –0.12 | 1.6 | 0.09 |
| BUN (mg/dL) | 48 | 6–20 | 16.6 (9.6) | 9.1 (6.3) | –7.5 (5.8) | –9.1 | –5.8 | 0.00 |
| Cr (mg/dL) | 48 | 0.5–1.2 | 0.76 (0.3) | 0.70 (0.2) | –0.05 (0.09) | –0.08 | –0.03 | 0.00 |
| BG (mg/dL) | 48 | 70–105 | 117 (39) | 121 (49) | 3.9 (53.7) | –11.7 | 19.5 | 0.62 |
| Ca (mg/dL) | 36 | 8.4–10.2 | 9.3 (0.4) | 9.0 (0.5) | –0.25 (0.43) | –0.40 | –0.11 | 0.00 |
| Mg (mg/dL) | 41 | 1.6–2.5 | 2.0 (0.23) | 2.0 (0.2) | –0.02 (0.21) | –0.09 | 0.05 | 0.56 |
| PO4 (mg/dL) | 41 | 2.7–4.5 | 3.5 (0.6) | 3.0 (0.8) | –0.45 (0.66) | –0.66 | –0.24 | 0.00 |
Na, sodium; K, potassium; Cl, chloride; CO2, bicarbonate; BUN, blood urea nitrogen; Cr, creatinine; BG, blood glucose; Ca, calcium; Mg, magnesium; PO4, phosphate; SD, standard deviation.