|  | M/z4276 | M/z4292 | M/z8129 | M/z8941 |
---|---|---|---|---|---|
 | n | Median intensity (IQR) | Median intensity (IQR) | Median intensity (IQR) | Median intensity (IQR) |
Day of sample preparation | Â | Â | Â | Â | Â |
   Day 1 | 24 | 74.04 (47.56–103.27) | 62.78 (45.17–79.91) | 27.39 (22.79–29.62) | 78.94 (45.96–84.49) |
   Day 2 | 24 | 24.83 (9.58–38.24) | 34.61 (28.54–39.32) | 22.65 (18.02–26.89) | 72.85 (50.43–105.05) |
p-value* | 48 | <0.001 | 0.001 | 0.008 | 0.853 |
Sample storage duration (months) | Â | Â | Â | Â | Â |
   ≤ 11 | 13 | 75.81 (33.59–118.06) | 63.48 (37.10–79.58) | 27.54 (21.94–31.63) | 57.48 (43.11–79.66) |
   12–17 | 11 | 72.28 (50.60–87.56) | 62.11 (46.25–83.88) | 27.24 (24.70–29.87) | 81.30 (52.43–99.14) |
   18–31 | 12 | 32.33 (12.37–40.50) | 33.99 (25.21–45.65) | 23.66 (15.58–27.08) | 62.97 (42.67–111.06) |
   ≥ 32 | 12 | 16.43 (8.38–35.85) | 34.77 (29.84–37.99) | 22.18 (20.46–26.89) | 73.47 (52.76–105.05) |
p-value# | 48 | 0.001 | 0.011 | 0.063 | 0.620 |
p-trend†| 48 | <0.001 | 0.003 | 0.032 | 0.423 |
Age (yrs) | Â | Â | Â | Â | Â |
   < 49.3 | 16 | 45.26 (19.00–77.58) | 46.38 (31.02–62.95) | 25.15 (21.29–27.55) | 73.84 (49.50–84.49) |
   49.3–57.5 | 16 | 19.79 (8.38–62.11) | 35.78 (28.52–63.14) | 24.90 (21.98–27.62) | 69.16 (39.17–85.8) |
   > 57.5 | 16 | 45.90 (23.58–85.81) | 40.01 (30.47–72.05) | 27.12 (20.43–33.59) | 76.15 (56.15–101.64) |
p-value# | 48 | 0.346 | 0.680 | 0.753 | 0.850 |
p-trend†| 48 | 0.583 | 0.940 | 0.438 | 0.880 |