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Table 2

p-values for the F-test of general linear models of faecal sludge parameters with each categorical explanatory variable

Variables compared	PO₄-P	NH₄-N	TP	TN	BOD	TS	VS	TSS	VSS
Septic tank vs cesspit	0.278	0.398	0.899	0.809	0.278	0.845	0.713	0.927	0.697
Lined vs unlined containment unit	0.266	0.900	0.329	0.098	0.039	0.029	0.008	0.022	0.006
Connected vs not connected to urban drainage network	<0.001	0.002	0.199	0.786	<0.001	0.002	<0.001	0.002	<0.001
Water added vs no water added	<0.001	<0.001	0.674	0.042	0.712	0.117	0.255	0.127	0.381
Only blackwater vs mixture of wastewaters	<0.001	<0.001	0.022	0.002	0.026	0.784	0.680	0.789	0.620
Number of users (<10, 10–50, >50 people)	0.517	0.579	0.417	0.786	0.249	0.888	0.999	0.954	0.840
Containment unit age (3–10, 10–20, >20 years)	0.395	0.468	0.636	0.967	0.686	0.939	0.992	0.895	0.953

Variables compared	PO₄-P	NH₄-N	TP	TN	BOD	TS	VS	TSS	VSS
Septic tank vs cesspit	0.278	0.398	0.899	0.809	0.278	0.845	0.713	0.927	0.697
Lined vs unlined containment unit	0.266	0.900	0.329	0.098	0.039	0.029	0.008	0.022	0.006
Connected vs not connected to urban drainage network	<0.001	0.002	0.199	0.786	<0.001	0.002	<0.001	0.002	<0.001
Water added vs no water added	<0.001	<0.001	0.674	0.042	0.712	0.117	0.255	0.127	0.381
Only blackwater vs mixture of wastewaters	<0.001	<0.001	0.022	0.002	0.026	0.784	0.680	0.789	0.620
Number of users (<10, 10–50, >50 people)	0.517	0.579	0.417	0.786	0.249	0.888	0.999	0.954	0.840
Containment unit age (3–10, 10–20, >20 years)	0.395	0.468	0.636	0.967	0.686	0.939	0.992	0.895	0.953

Bolded values indicate a significant difference in hypothesis testing (p<0.05). For abbreviations, see the text.