An analysis of patients with variant forms of α-thalassemia from Bangkok, Thailand. The top panel shows the Hb concentration. The subsequent four panels are parameters derived from the H*3 Bayer Hematology Analyzer indicating the mean cell volume (MCV), the mean cell Hb content (MCH), and the mean cell Hb concentration (MCHC), while the bottom panel indicates the percent of cells that are hypochromic (percent of RBC where the MCHC is less than 28 g/dL). The error bars indicate 1 standard deviation about the mean. Abbreviations: α-T, α-thalassemia-1 trait; CS-T, heterozygous HbCS; CS/CS, homozygous CS; HbH, α-thalassemia-1 trait/α-thalassemia-2 trait; HbH/CS, α thalassemia-1 trait/α^CSα. The symbols indicate P values showing significant differences from the normal. The following symbols indicate the respective P values: NS, not significant; #, < .01; ⋄, < .0005; ▵, < .0001. The number of analyses done for the top four panels are indicated within the bars in the top panel. The number of analyses done to determine the extent of hypochromia (bottom panel) are indicated within or on the bars in that panel.