Table 2

Component	Est. Probability of Membership among Premature (per 1,000 Births)	95% Confidence Interval
Component		Lower	Upper
1	45.7	25.0	82.0
2	782.0	538.0	917.0
3	149.0	31.2	487.8
4	0.0	0.0	1.6
Component	Est. Probability of Membership among Maternal Diabetic (per 1,000 Births)	95% Confidence Interval
Component		Lower	Upper
1	2.1	0.1	52.6
2	120.3	69.4	200.4
3	772.3	669.0	850.6
4	85.1	29.3	222.9
Component	Est. Probability of Membership among Maternal Chronic HBP (per 1,000 Births)	95% Confidence Interval
Component		Lower	Upper
1	7.8	0.0	612.7
2	201.3	94.0	379.7
3	690.9	503.0	831.6
4	59.3	9.3	298.0
Component	Est. Probability of Membership among Previous Preterm Birth (per 1,000 Births)	95% Confidence Interval
Component		Lower	Upper
1	15.1	2.0	105.5
2	350.5	175.5	577.6
3	579.5	359.7	771.8
4	26.8	5.7	117.9

Table 2: Estimated probabilities of component membership among those with risk factors. Displayed are estimated probabilities of membership within each component among infants born severely premature (< 29 weeks), to mothers with diabetes, to mothers with chronic HBP, and to mothers with a previous preterm birth, along with 95% confidence intervals.