Table 1 The prevalence (%) of hypertension by seven waves

 Male

43.1(41.4–44.7)

43.3(41.9–44.8)

42.3(40.9–43.9)

48.8(47.3–50.3)

46.3(44.8–47.8)

50.1(48.1–52.1)

55.3(53.0–57.5)

 Female

43.1(41.7–44.4)

43.8(42.6–45.1)

43.4(42.3–44.6)

46.4(45.2–47.6)

45.8(44.6–47.0)

54.6(53.0–56.2)

57.4(55.5–59.3)

 p

0.995

0.607

0.277

0.016

0.602

< 0.001

0.150

 80–89 yrs

45.4(43.7–47.1)

44.3(42.9–45.7)

44.5(43.0–46.0)

51.3(49.8–52.9)

50.2(48.6–57.1)

56.7(54.8–58.6)

59.9(57.9–62.0)

 90–99 yrs

43.9(42.1–45.7)

44.3(42.7–45.9)

43.5(42.7–45.9)

46.9(45.4–48.5)

46.4(44.9–47.9)

52.6(50.6–46.6)

54.3(51.8–56.7)

 100- yrs

38.7(36.7–40.6)

41.2(39.2–43.2)

40.5(38.8–42.3)

42.3(40.4–44.1)

39.9(38.8–42.3)

46.0(43.4–48.6)

52.2(48.9–55.6)

 p _{for trend}

< 0.001

0.032

0.003

< 0.001

< 0.001

< 0.001

< 0.001

 City

41.8(40.1–43.5)

43.2(41.7–45.1)

43.0(41.1–44.9)

45.9(44.6–47.2)

43.7(41.7–45.8)

48.8(43.8–51.7)

51.1(41.2–55.1)

 Town

43.4(41.5–44.9)

43.0(41.3–45.1)

48.4(46.5–50.3)

46.1(44.9–47.3)

51.0(48.8–53.3)

56.2(53.7–58.8)

 Rural

43.8(42.3–45.3)

44.2(41.7–46.3)

43.2(41.7–44.3)

50.0(47.8–52.0)

48.9(46.9–51.0)

55.1(53.4–56.8)

58.0(56.1–59.9)

 p _{for trend}

0.123

< 0.001

0.634

< 0.001

< 0.001

0.006

0.838

Total

43.1(42.0–44.1)

43.6(42.7–44.5)

43.0(42.1–43.9)

47.3(46.4–48.3)

46.0(45.1–46.9)

52.8(51.6–54.0)

56.5(55.1–58.0)

Weighted Total^†

45.2(44.2–46.3)

44.8(43.9–45.8)

44.4(42.4–46.4)

50.6(48.6–52.6)

50.2(48.2–52.2)

53.8(51.6–55.9)

57.4(55.1–59.7)

Weighted Total^†

45.3(43.8–46.9)

44.3(43.1–45.6)

44.6(43.2–45.9)

50.9(49.5–52.3)

49.8(48.5–51.3)

56.6(54.8–58.3)

59.5(57.6–61.4)