Table 7.

Stability tests of microspheres with different feed ratios (N ≥ 500)

Feed ratio	Time points (month)	Drug loading (%)	Span (µm)
1:3	0	33.09 ± 1.89	27.47 ± 8.78
	1	32.26 ± 2.01	28.01 ± 8.92
	2	33.28 ± 1.23	26.32 ± 7.33
	3	32.67 ± 1.66	29.11 ± 9.15
1:4	0	30.33 ± 2.01	29.66 ± 10.02
	1	31.26 ± 2.45	31.24 ± 10.87
	2	30.78 ± 1.96	28.99 ± 9.86
	3	31.71 ± 2.34	30.58 ± 10.29
1:5	0	24.29 ± 1.78	30.14 ± 11.20
	1	25.31 ± 2.04	30.55 ± 10.26
	2	26.77 ± 3.20	31.29 ± 11.83
	3	25.36 ± 2.11	31.54 ± 11.90