Appendix 1 - Methods for Sampling Women within Selected Providers

Appendix 1 - Methods for Sampling Women within Selected Providers
	Interpretation of Sampling Rate (1 in X week(s))
						Sampling rate = 1 in X week(s)
						1	2	3	4	5	6	7	8
			# of Sampled Periods			17	8 or 9	5 or 6	4 or 5	3 or 4	2 or 3	2 or 3	2
A.	Within-Provider Location Sampling Rate:				0.45		D.	Within-Provider Location Sampling Rate:				0.125
	Within-List Skip Interval:							Within-List Skip Interval:
	String of Consecutive Days (s)*	Sampling rate = 1 in X week(s)						String of Consecutive Days (s)*	Sampling rate = 1 in X week(s)
		1	2						1	2	3	4	5	6	7	8
	5	2.2	1.1					5	8.0	4.0	2.7	2.0	1.6	1.3	1.1	1.0
	4	1.8						4	6.4	3.2	2.1	1.6	1.3	1.1
	3	1.3						3	4.8	2.4	1.6	1.2	1.0
	2							2	3.2	1.6	1.1
	1							1	1.6
B.	Within-Provider Location Sampling Rate:				0.3		E.	Within-Provider Location Sampling Rate:				0.06
	Within-List Skip Interval:							Within-List Skip Interval:
	String of Consecutive Days (s)*	Sampling rate = 1 in X week(s)						String of Consecutive Days (s)*	Sampling rate = 1 in X week(s)
		1	2	3					1	2	3	4	5	6	7
	5	3.3	1.7	1.1				5	16.7	8.3	5.6	4.2	3.3	2.8	2.4
	4	2.7	1.3					4	13.3	6.7	4.4	3.3	2.7	2.2	1.9
	3	2.0	1.0					3	10.0	5.0	3.3	2.5	2.0	1.7	1.4
	2	1.3						2	6.7	3.3	2.2	1.7	1.3	1.1	1.0
	1							1	3.3	1.7	1.1
C.	Within-Provider Location Sampling Rate:				0.2		F.	Within-Provider Location Sampling Rate:				0.03
	Within-List Skip Interval:							Within-List Skip Interval:
	String of Consecutive Days (s)*	Sampling rate = 1 in X week(s)						String of Consecutive Days (s)*	Sampling rate = 1 in X week(s)
		1	2	3	4	5			1	2	3	4	5	6	7
	5	5.0	2.5	1.7	1.3	1.0		5	33.3	16.7	11.1	8.3	6.7	5.6	4.8
	4	4.0	2.0	1.3	1.0			4	26.7	13.3	8.9	6.7	5.3	4.4	3.8
	3	3.0	1.5	1.0				3	20.0	10.0	6.7	5.0	4.0	3.3	2.9
	2	2.0	1.0					2	13.3	6.7	4.4	3.3	2.7	2.2	1.9
	1	1.0						1	6.7	3.3	2.2	1.7	1.3	1.1	1.0
	NOTE: Within-list skip intervals that are less than 4 are in bold. Within-list skip intervals that are below 1 have been suppressed.
*	Note that s = 5 corresponds to the entire week being in sample.
	Method 1	List of women from each day is maintained. Periodically, the skip interval is systematically applied to cumulative list to select the sampled women for contact.
	Method 2	Subsample of weeks (1 in x week(s)) are selected for listing women each day of each sampled week with a systematic selection of sampled women needed, as well.
	Method 3	Subsample of weeks (1 in x week(s)) are selected for listing women each day of each sampled week such that no further systematic selection of women is needed. Note that this solution is not viable for Tables E and F.
	Method 4	Subsample of weeks (1 in x week(s)) are selected for listing women on a rotating subset of s days (s<5) each sampled week such that no further systematic selection of women is needed.