Appendix Table 4.

Distribution of 959 SWIFT Participants Among Lactation Intensity Groups at 6 to 9 wk After Delivery and Lactation Duration Groups at the End of Follow-up^*

Lactation Intensity Groups at 6 to 9 wk After Delivery (Baseline)	Lactation Duration Groups
	0–2 mo	>2–5 mo	>5–10 mo	>10 mo	Total
Exclusive lactation	2 (0.2)	20 (2.1)	45 (4.7)	138 (14.4)	205 (21.4)
Mostly lactation (≤6 oz of formula per day)	5 (0.5)	73 (7.6)	116 (12.1)	193 (20.1)	387 (40.3)
Mostly formula feeding (>17 oz of formula per day) and mixed/inconsistent lactation	29 (3.0)	97 (10.1)	47 (4.9)	41 (4.3)	214 (22.3)
Exclusive formula feeding	153 (16.0)	0 (0)	0 (0)	0 (0)	153 (16.0)
Overall total	189 (19.7)	190 (19.8)	208 (21.7)	372 (38.8)	959 (100)

SWIFT = Study of Women, Infant Feeding, and Type 2 Diabetes After GDM Pregnancy.

^*P < 0.001. Values are numbers (percentages).