Table 3 Estimated age, period and cohort effects of migraine among women of childbearing age in China 1990–2019
Factors | Net drifta, % per year | Local driftb | RR(95%CI) |
|---|---|---|---|
Overall | 0.21(0.19,0.23) | Â | Â |
Age | |||
 15 to 19 |  | 0.15(0.10,0.19) | 0.90(0.90,0.91) |
 20 to 24 |  | 0.12(0.09,0.15) | 0.90(0.89,0.91) |
 25 to 29 |  | 0.14(0.12,0.17) | 1.00 |
 30 to 34 |  | 0.18(0.15,0.20) | 0.94(0.94,0.94) |
 35 to 39 |  | 0.24(0.21,0.27) | 0.95(0.95,0.96) |
 40 to 44 |  | 0.32(0.28,0.35) | 0.88(0.87,0.88) |
 45 to 49 |  | 0.34(0.29,0.39) | 0.68(0.68,0.69) |
Period | |||
 1990 to 1994 |  |  | 1.00(0.99,1.00) |
 1995 to 1999 |  |  | 0.99(0.98,0.99) |
 2000 to 2004 |  |  | 1.00 |
 2005 to 2009 |  |  | 1.03(1.03,1.04) |
 2010 to 2014 |  |  | 1.03(1.03,1.04) |
 2015 to 2019 |  |  | 1.04(1.03,1.04) |
Cohort | |||
 1940 to 1949 |  |  | 0.91(0.90,0.93) |
 1945 to 1954 |  |  | 0.92(0.91,0.93) |
 1950 to 1959 |  |  | 0.94(0.94,0.95) |
 1955 to 1964 |  |  | 0.96(0.960.97) |
 1960 to 1969 |  |  | 0.98(0.97,0.98) |
 1965 to 1974 |  |  | 0.99(0.98,0.99) |
 1970 to 1979 |  |  | 1.00 |
 1975 to 1984 |  |  | 1.00(1.00,1.01) |
 1980 to 1989 |  |  | 1.01(1.00,1.01) |
 1985 to 1994 |  |  | 1.01(1.01,1.02) |
 1990 to 1999 |  |  | 1.02(1.01,1.03) |
 1995 to 2004 |  |  | 1.04(1.03,1.05) |