TABLE 3—

Joinpoint Regression Analyses: US Black and White Infant Death Rates, and Absolute Difference in Black–White Infant Death Rates, in the Jim Crow and Non–Jim Crow Polities, 1960–2006

		Change in Slope Estimates
Rate and Joinpoint Segment	Joinpoint (95% CI)	Slope Estimate	Slope SE	Slope Probability > t
Jim Crow polity
Black
1	…	…	…	…
2	1964 (1962, 1967)	−0.0768	0.0253	0.0049
3	1968 (1965, 1986)	0.0245	0.0222	0.2791
4	1984 (1977, 1990)	0.0349	0.0145	0.0229
5	1989 (1980, 1997)	−0.0394	0.0170	0.0273
6	1995 (1991, 2004)	0.0310	0.0094	0.0026
White
1	…	…	…	…
2	1964 (1962, 1965)	−0.0632	0.0369	0.0966
3	1967 (1965, 1968)	0.0936	0.0517	0.0803
4	1970 (1969, 1972)	−0.1123	0.0531	0.0429
5	1973 (1972, 1977)	0.0537	0.0375	0.1622
6	1995 (1993, 1998)	0.0318	0.0022	0.0000
Black–White difference
1	…	…	…	…
2	1965 (1962, 1967)	−0.0028	0.0010	0.0093
3	1969 (1966, 1974)	0.0018	0.0009	0.0574
4	1982 (1971, 2004)	0.0002	0.0001	0.0226
Non–Jim Crow polity
Black
1	…	…	…	…
2	1965 (1962, 1970)	−0.0413	0.0135	0.0043
3	1984 (1974, 1987)	0.0514	0.0302	0.0988
4	1988 (1986, 1991)	−0.0626	0.0303	0.0469
5	2001 (1992, 2004)	0.0403	0.0114	0.0012
6
White
1	…	…	…	…
2	1970 (1965, 1972)	−0.0553	0.0375	0.1498
3	1973 (1969, 1976)	0.0684	0.0428	0.1197
4	1977 (1972, 1994)	−0.0233	0.0209	0.2728
5	1996 (1991, 2000)	0.0234	0.0033	0.0000
6
Black–White difference
1	…	…	…	…
2	1985 (1979, 1987)	0.0011	0.0013	0.4287
3	1988 (1986, 1991)	−0.0012	0.0013	0.3578
4	2001 (1995, 2004)	0.0006	0.0002	0.0005

Note. CI = confidence interval.