Table V.

Summary of methods for various outcome-observation dependence mechanisms.

				Lin	Bůžková	Liang	Liang (extension)	Weighted-Liang (extension)	Sun	Weighted-Sun (extension)
Time-independent covariates in the observation-time model	Mechanism (Ml)	Conditional independence given outcome-models covariates		+	+	+	+	+	+	+
	Mechanism (M2)	Conditional independence given observation-time model covariates		−	+	−	−	+	−	+
	Mechanism (M3) Conditional independence given latent variables (LV)	LV not associated with outcome-model covariates	LV distribution specified Gamma	+	+	+	+	+	+	+
			LV distribution unspecified	+	+	+	+	+	+	+
		LV associated with outcome-model co variates	Effect of LV modified by Q(t)*	−	−	−	+	+	−	−
			Distribution of LV based on Q(t)*	−	−	−	−	−	+	+
	Mechanisms (M2) + (M3)			−	−	−	−	+/−	−	+/−
Time-dependent co variates in the observation-time model				+/−	+/−	N/A	+/−	+/−	+/−	+/−

+ appropriate; − not appropriate; +/− appropriate under certain situations; N/A not applicable.

^*$Q(t)$ is a subset of $X(t)$.