| | Project | Code | Assignment |
| | Gender | X1 | 1 = male, 2 = female | | Age | X2 | 1 = under 40 years old, 2 = 40–59 years old, 3 = 60 years old and above | | Height | X3 | 1 = below 160 cm, 2 = 161–170 cm, 3 = 171–180 cm, 4 = above 181 | | Weight | X4 | 1 = below 40 kg, 2 = 41–50 kg, 3 = 51–60 kg, 4 = above 60 kg | | Smoking | X5 | 1 = yes, 2 = no | | Drink | X6 | 1 = yes, 2 = no | | History of drug allergy | X7 | 1 = yes, 2 = no | | History of diabetes | X8 | 1 = yes, 2 = no | | Tumor types | X9 | 1 = gastric cancer, 2 = colorectal cancer, 3 = esophageal cancer | | Times of chemotherapy | X10 | 1 = 1–6 times, 2 = more than 6 times | | PICC catheter site | X11 | 1 = basilic vein, 2 = median cubital vein, 3 = cephalic vein | | Catheter factors | X12 | 1 = catheter size, 2 = catheter model, 3 = catheter cavity number | | Catheterization technology | X13 | 1 = direct puncture, 2 = Seldinger technique | | Puncture times | X14 | 1 = more than 2 times, 2 = 1 success | | Position of catheter tip | X15 | 1 = too deep, 2 = too shallow, 3 = level 6, 7 thoracic vertebrae | | Maintenance mode | X16 | 1 = out of hospital maintenance, 2 = inhospital maintenance | | Maintenance cycle | X17 | 1 = less than or equal to 7 d, 2 = more than 7 d |
|
|
