Table 3. Quality Assessment of Study Population^*.

Questions		Study Assessed
		1	2	3	4	5	6	7	8	9	10
General	Inclusion criteria described?	2	1	2	0	0	2	2	1	2	2
	Study sample described?	1	2	2	2	0	0	0	0	2	2
	Sample representative of population?	2	2	2	0	0	1	2	1	2	2
	Sample selected randomly?	2	1	1	0	0	0	2	2	N/A	2
	Non-response rate reported?	2	2	2	2	2	0	2	2	2	2
	General Sub-Total (%)	90	80	90	40	20	30	80	60	100	100
Systematic Review Specific	Sample selected independent of orphan status?	2	0	0	2	0	2	2	0	2	2
	Physical abuse defined?	N/A	2	1	0	N/A	N/A	N/A	2	N/A	N/A
	Sexual abuse defined?	0	N/A	1	0	0	1	2	N/A	1	1
	Orphan status defined?	2	2	2	2	2	1	2	0	2	2
	Measurement of physical abuse defined?	N/A	2	1	0	N/A	N/A	N/A	2	N/A	N/A
	Measurement of sexual abuse defined?	2	N/A	1	0	2	1	0	N/A	2	2
	Ascertainment of orphan status described?	1	2	0	1	0	0	1	0	2	2
	Orphan status verified using a secondary source?	0	2	0	0	0	0	0	0	0	0
	Valid tool(s) used to measure physical abuse?	N/A	2	1	1	N/A	N/A	N/A	0	N/A	N/A
	Valid tool(s) used to measure sexual abuse?	0	N/A	1	1	0	2	2	N/A	0	0
	Reliable tool(s) used to measure physical abuse?	N/A	0	0	0	N/A	N/A	N/A	0	N/A	N/A
	Reliable tool(s) used to measure sexual abuse?	0	N/A	0	0	0	2	0	N/A	0	0
	Interviewer blind to orphan status?	0	0	0	0	0	0	0	0	N/A	0
	Systematic Review Specific SubTotal (%)	39	67	31	27	22	50	50	22	56	50
Analysis	Statistics used to assess relationship between orphan status and abuse described?	0	2	1	N/A	2	2	2	2	2	2
	Any efforts to control confounders in above relationship?	2	0	1	N/A	2	0	2	2	2	2
Total Score (%)**		56	69	48	31	31	44	66	44	75	72

^*Scoring: 2=fully answered question, 1=partially answer the question and 0 =did not answer the question

^**Totals presented as proportions to enable cross-study comparisons as denominators differed between studies

N/A = not applicable