TABLE 1.
The changes in MCV and other CBC components in decade‐wise age groups
| Age group (years) | 1–9 | 10–19 | 20–29 | 30–39 | 40–49 | 50–59 | 60–69 | 87–79 | 80–88 | p‐value a |
|---|---|---|---|---|---|---|---|---|---|---|
| Count, n | 27,793 | 48,305 | 94,281 | 111,288 | 156,606 | 207,670 | 176,107 | 122,709 | 32,576 | |
| MCV, fl (median, IQR) | 82.2 (80.5–84.3) | 87.4 (84.7–90.1) | 89.9 (87.4–92.5) | 90.4 (87.7–93.1) | 91.2 (88.5–93.9) | 91.5 (88.9–94.3) | 92.1 (89.4–94.9) | 92.6 (89.8–95.4) | 93.0 (90.2–95.9) | <0.001 b |
| Hb, g/dl (median, IQR) | 13.2 (12.7–13.6) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | 14.0 (13.2–15.0) | <0.001 |
| Hct, % (median, IQR) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | 38.0 (35.8–39.7) | <0.001 |
| RBC, g/dl (median, IQR) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | 4.7 (4.5–4.9) | <0.001 |
| RDW, % (median, IQR) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | 12.0 (12.0–13.0) | <0.001 |
Abbreviations: CBC, Complete blood count; Hb, haemoglobin; Hct, haematocrit; IQR, interquartile range; MCV, mean corpuscular volume; RBC, red blood cell; RDW, red cell distribution width.
p‐value from the Kruskal–Wallis test.
All age groups showed significant differences in post hoc tests with the Tukey method.