Table 2 Prevalence and gene frequency of thalassemia found among 371 subjects inhabiting at the border region of Thailand, Lao PDR and Cambodia (95% confidence interval in parentheses).

− α^3.7a

12

33.3

0.167

36

33.3

0.165^c

46

46.9

0.235^{c, d}

37

28.9

0.145^d

(22.2–44.4)

(0.079–0.255)

(26.7–39.4)

(0.115–0.215)

(39.8–54.1)

(0.174–0.295)

(23.2–34.6)

(0.101–0.188)

− α^4.2

1

2.8

0.014

2

1.8

0.009

0

0

0

2

1.1

0.008

(− 1.1–6.7)

(− 0.014–0.041)

(0–3.7)

(− 0.004–0.222)

(0–3.1)

(− 0.003–0.019)

α^CS

4

11.1

0.056

19

17.4

0.087

18

18.4

0.092

16

12.5

0.063

(3.7–18.5)

(0.002–0.110)

(12.3–22.6)

(0.049–0.125)

(12.8–23.9)

(0.051–0.133)

(8.4–16.6)

(0.032–0.093)

α^PS

1

2.8

0.014

1

0.9

0.005

3

3.1

0.015

1

0.8

0.004

(− 1.1–6.7)

(− 0.014–0.041)

(− 0.4–2.2)

(− 0.005–0.014)

(0.6–5.5)

(− 0.002–0.033)

(− 0.3–1.9)

(− 0.004–0.012)

α⁰-thalassemia

2

5.6

0.028

3

2.8

0.014

3

3.1

0.015

5

4.7

0.023

(0.2–11.0)

(− 0.011–0.067)

(0.5–5.0)

(− 0.002–0.030)

(0.6–5.5)

(− 0.002–0.033)

(2.0–7.3)

(0.005–0.042)

Hb E^a

16

44.4

0.222

51

46.8

0.234

52

53.1

0.265

58

45.3

0.227

(32.7–56.2)

(0.124–0.320)

(40.0–53.5)

(0.177–0.291)

(45.9–60.2)

(0.202–0.328)

(39.1–51.5)

(0.174–0.279)

β-thalassemia^b

0

0

0

0

0

0

1

1

0.005

2

1.1

0.008

(− 0.4–2.5)

(− 0.005–0.015)

(0–3.1)

(− 0.003–0.019)