Table 8. Age-standardized prevalence of prehypertension among Chinese adults during 1991–2015.
| Variable | 1991 (n = 8604) |
1993 (n = 8203) |
1997 (n = 8592) |
2000 (n = 9473) |
2004 (n = 9209) |
2006 (n = 9165) |
2009 (n = 9499) |
2011 (n = 12,542) |
2015 (n = 11,296) |
AAI, mmHg |
ARI, % |
Ptrend- value |
| AAI was computed by dividing the difference of prevalence between 1991 and 2015 by the number of years covered; ARI was calculated by dividing the average annual change by the baseline prevalence in 1991. AAI: average annual increase; ARI: average relative increase. | ||||||||||||
| Overall | 30.1% (29.1%–31.1%) |
33.4% (32.4%–34.4%) |
36.9% (35.9%–37.9%) |
38.4% (37.5%–39.4%) |
41.3% (40.2%–42.4%) |
41.6% (40.5%–42.8%) |
41.0% (39.9%–42.1%) |
42.4% (41.4%–43.4%) |
43.1% (41.9%–44.2%) |
0.5 | 1.8 | < 0.001 |
| Age, yrs | ||||||||||||
| 18–39 | 26.8% (25.5%–28.1%) |
30.6% (29.2%–32.1%) |
35.4% (33.9%–37.0%) |
35.9% (34.3%–37.4%) |
40.7% (38.8%–42.6%) |
39.6% (37.6%–41.7%) |
37.3% (35.3%–39.3%) |
38.3% (36.5%–40.1%) |
41.0% (38.8%–43.2%) |
0.6 | 2.2 | < 0.001 |
| 40–59 | 33.7% (32.0%–35.5%) |
36.7% (35.0%–38.5%) |
39.9% (38.2%–41.6%) |
42.2% (40.7%–43.8%) |
44.2% (42.7%–45.8%) |
45.4% (43.9%–46.9%) |
46.2% (44.7%–47.7%) |
47.4% (46.1%–48.7%) |
45.8% (44.4%–47.2%) |
0.5 | 1.5 | < 0.001 |
| ≥ 60 | 31.1% (28.6%–33.8%) |
33.7% (31.2%–36.3%) |
34.2% (31.9%–36.6%) |
37.2% (35.0%–39.4%) |
36.4% (34.3%–38.4%) |
38.8% (36.8%–40.8%) |
39.6% (37.8%–41.5%) |
42.9% (41.3%–44.5%) |
42.6% (41.1%–44.1%) |
0.5 | 1.5 | < 0.001 |
| Sex | ||||||||||||
| Male | 34.5% (33.0%–36.0%) |
38.3% (36.7%–39.8%) |
41.0% (39.5%–42.5%) |
44.2% (42.8%–45.7%) |
47.2% (45.6%–48.8%) |
47.8% (46.1%–49.4%) |
46.2% (44.5%–47.8%) |
49.4% (47.9%–50.9%) |
48.9% (47.1%–50.7%) |
0.6 | 1.7 | < 0.001 |
| Female | 26.0% (24.8%–27.3%) |
29.0% (27.7%–30.4%) |
32.7% (31.3%–34.1%) |
33.0% (31.7%–34.4%) |
35.4% (34.0%–36.9%) |
35.8% (34.3%–37.4%) |
36.0% (34.5%–37.5%) |
36.4% (35.1%–37.7%) |
38.2% (36.7%–39.7%) |
0.5 | 1.9 | < 0.0001 |