Table 2.

Summary statistics for the outcome variables by the length of preceding and subsequent birth intervals in months

	Physical Fitness (watts)				Height (cm)
	Preceding		Subsequent		Preceding		Subsequent
Interval	Mean	SD	Mean	SD	Mean	SD	Mean	SD
9–12	295.1	50.4	294.4	52.7	178.8	6.6	178.6	6.6
13–18	297.0	51.7	298.5	52.6	179.3	6.5	179.4	6.6
19–24	299.6	52.1	301.7	51.2	179.5	6.5	179.8	6.5
25–30	301.4	51.4	302.2	51.3	179.5	6.4	179.6	6.5
31–36	300.9	51.3	302.3	51.4	179.5	6.5	179.6	6.5
37–42	299.9	50.7	301.5	51.3	179.5	6.5	179.5	6.5
43–48	299.0	51.1	302.4	51.2	179.5	6.4	179.6	6.5
49–54	299.1	51.6	301.4	50.8	179.6	6.5	179.5	6.4
55–60	298.3	50.4	299.8	51.0	179.5	6.5	179.5	6.5
61–66	298.6	50.1	301.5	52.0	179.5	6.4	179.4	6.5
67–72	298.9	52.0	300.8	50.9	179.7	6.6	179.4	6.5
73–78	299.1	50.8	302.3	50.7	179.6	6.6	179.4	6.5
79–84	298.1	51.6	301.5	52.5	179.4	6.7	179.3	6.6
85–90	297.8	49.0	299.5	51.6	179.6	6.2	179.5	6.5
91–96	299.4	49.9	299.4	49.1	179.9	6.5	179.1	6.5
97+	297.5	51.6	299.7	50.5	179.5	6.5	179.3	6.4
Total	299.4	51.3	301.2	51.3	179.5	6.5	179.5	6.5
	Underweight		Overweight		Mortality
	Preceding	Subsequent	Preceding	Subsequent	Preceding		Subsequent
Interval	%	%	%	%	Rate (10–3)	Deaths	Rate (10–3)	Deaths
9–12	6.4	6.8	9.5	11.7	1.22	659	1.25	624
13–18	7.5	7.2	10.2	10.9	1.20	6,322	1.32	6,352
19–24	6.5	7.3	9.9	10.3	1.18	7,366	1.37	7,658
25–30	6.8	7.1	9.8	10.8	1.25	6,230	1.41	6,287
31–36	6.9	7.1	11.0	10.5	1.23	5,038	1.46	5,374
37–42	7.1	7.3	11.0	10.9	1.24	3,982	1.49	4,337
43–48	6.4	7.3	11.3	10.8	1.21	3,269	1.56	3,758
49–54	7.3	7.0	11.5	11.2	1.22	2,586	1.52	2,943
55–60	6.7	7.0	13.0	10.7	1.12	2,041	1.60	2,606
61–66	5.9	6.8	13.2	10.8	1.16	1,659	1.61	2,125
67–72	7.3	6.7	13.9	10.3	1.16	1,349	1.59	1,689
73–78	7.9	6.1	14.1	11.4	1.09	1,026	1.58	1,398
79–84	6.7	6.6	15.3	10.4	1.06	822	1.64	1,215
85–90	6.1	7.4	15.4	11.3	1.00	596	1.66	980
91–96	4.5	6.5	17.1	10.8	0.95	477	1.63	843
97+	6.0	6.3	18.0	11.1	0.84	1,635	1.68	3,820
Total	6.8	7.0	11.5	10.8	1.18	45,057	1.47	52,009