Table 5. Insulin resistance indexes’ mean values estimated during six periods in the peripartum of grazing cows under tropical conditions.

		Periods (days with respect to partum)
Variable	Treatment	−30	SE	−15	SE	0	SE	15	SE	30	SE	45	SE	Interaction (p-value)*
QUICKI	1	0.32a	0.01	0.35a	0.01	0.40a	0.01	0.39a	0.01	0.38ab	0.01	0.37 a	0.01	0.0053
	2	0.31a	0.01	0.32a	0.01	0.38a	0.01	0.38ab	0.01	0.40a	0.01	0.38a	0.01
	3	0.34a	0.01	0.33a	0.01	0.35b	0.01	0.36b	0.01	0.36b	0.01	0.35b	0.01
RQUICKI	1	0.41	0.02	0.42	0.02	0.44	0.02	0.48	0.02	0.49	0.02	0.50	0.02	NS
	2	0.39	0.02	0.38	0.02	0.42	0.02	0.48	0.02	0.50	0.02	0.47	0.02
	3	0.43	0.02	0.4	0.02	0.42	0.02	0.46	0.02	0.47	0.02	0.47	0.02
RQUICKI–BHB	1	0.47	0.04	0.48	0.03	0.44	0.03	0.47	0.03	0.5	0.03	0.52	0.03	NS
	2	0.43	0.03	0.42	0.03	0.42	0.03	0.49	0.03	0.53	0.03	0.49	0.03
	3	0.49	0.03	0.48	0.03	0.44	0.03	0.48	0.03	0.49	0.03	0.50	0.03
HOMA	1	72.5 ab	9.7	43.8b	6.41	18.1b	6.41	23.5a	6.41	27.9ab	6.41	28.6a	6.41	<0.0001
	2	90.1a	6.41	74.7a	6.41	31.7b	6.41	23.6a	6.41	19.9b	6.41	30.6a	6.41
	3	54.4 b	6.41	67.1a	6.41	53.2a	6.41	32.0a	6.41	44.2a	6.41	44.3a	6,41

QUICKI: quantitative insulin sensitivity check index; RQUICKI: revised quantitative insulin sensitivity check index; RQUICKI–BHB: revised quantitative insulin sensitivity check index–BHB; HOMA: homeostasis model assessment; SE: standard error.

The treatment (*) period interaction was significant with a p <0.05.