. 2019 Nov 26;66(4):333–343. doi: 10.1093/cz/zoz058

Table 2.

GLM analysis of the effect of method (observational scans and macroscopic fecal sampling) and month on the proportion of fruit, pith, leaves, and flowers in the chimpanzee diet over a 12-month period (2016–2017)

	Fruit:				Pith:				Leaf:			Flower:
Predictors	χ²		Effect±SE	95% CI	χ²	Effect±SE	95% CI		χ²	Effect±SE	95% CI	χ²	Effect±SE	95% CI
Method	38				247				54			266
		Fec	−0.39±0.06	−0.52, −0.27		2.15±0.13		1.89, 2.42		−0.67±0.09	0.49, 0.85		−3.24±0.19	−3.63, −2.85
		Obs	0_a			0_a				0_a			0_a
Met*Mon	509		See Figure 3		244	See Figure 4			243	See Figure 5		547	See Figure 6
Month	329		0_a		121	0_a			129	0_a		287	0_a
		Sep	0.45±0.18	−0.03, 0.95		−0.58±0.24		−1.06, −0.10		−0.71±0.23	−1.16, −0.26		–	–
		Oct	0.53±0.15	0.24, 0.81		−1.08±0.21		−1.51, −0.66		−0.43±0.17	−0.76, −0.09		–	–
		Nov	0.42±0.14	0.14, 0.70		−0.74±0.20		−1.13, −0.35		−0.90±0.18	−1.26, −0.83		0_a
		Dec	0_a			0_a				0_a			–	–
		Jan	0.81±0.15	0.52, 1.10		−0.52±0.19		−0.89, −0.14		−1.14±0.20	−1.50, −0.73		–	–
		Feb	0.68±0.15	0.39, 0.97		−0.84±0.20		−1.24, −0.43		−1.19±0.20	−1.58, −0.79		1.68±0.36	0.97, 2.01
		Mar	−0.69±0.15	−0.97, −0.40		−0.71±0.20		−1.10, −0.32		−0.58±0.18	−0.93, −0.24		3.61±0.35	2.92, 3.94
		Apr	0.96±0.15	0.66, 1.25		−0.91±0.20		−1.32, −0.51		−0.71±0.18	−1.06, −0.36		2.99±0.35	2.31, 3.28
		May	−0.18±0.14	−0.46, 0.09		−1.87±0.26		−2.39, −1.34		−0.90±0.19	−1.27, −0.53		1.48±0.36	0.75, 1.82
		Jun	0.79±0.15	0.51, 1.09		−2.04±0.28		−2.59, −1.50		−1.69±0.23	−2.15, −1.23		2.28±0.35	1.58, 2.67
		Jul	1.12±0.15	0.81, 1.41		−1.61±0.23		−2.11, −1.13		−1.40±0.21	−1.82, −0.98		0.84±0.38	0.76, 1.62
		Aug	1.63±0.16	1.30, 1.96		−1.73±0.25		−1.99, −0.98		−2.02±0.26	−2.54, −1.51		0.74±0.38	−0.04, 1.52

0_a is set to zero because this category level is the reference category.