Table 2 Sampling strategy and sample size calculations for each Integra research component

Sampling of facilities

Theoretical sampling to point of saturation within province

4 criteria: high client load; minimum of 2 FP providers; range of SRH services available; no current provision of SRH-HIV integration

n/a

12 facilities: 6 Intervention and 6 Comparison

12 facilities: 6 Intervention and 6 Comparison

8 facilities: 4 Intervention and 4 Comparison*

HFAs: Facility inventory

1 per facility

1 per facility

1 per facility

HFAs: Client exit interviews & linked observations of consultations

Consecutive sample and saturation

Quality of Care analysis 6 CPIs

No

18 per facility: 6 new clients, 6 repeat clients and 6 clients switching FP method

6 within 48 hours postpartum 6 at one week and 6 at 6 weeks per facility

6 within 48 hours postpartum 6 at one week and 6 at 6 weeks

HFAs: Structured interviews with providers

Convenience

All providers working in MCH-FP units

No

3-6 providers per facility

3-6 providers per facility

3-6 providers per facility

HFAs: Client flow assessment

Census over 5 days based on existing client load

No

50 – 200 clients per day

50 – 200 clients per day

50 – 200 clients per day

Cohort

Consecutive sample of female clients (recruited if within 12 weeks post-partum in PNC facilities)

Kenya: 80% power to detect a 5% increase in condom use, among all women in PNC and those using other contraceptive methods in FP facilities.

1952 clients: 976 from Intervention and 976 from Comparison facilities

Swaziland: To detect a 7% increase in condom use among PNC clients.

30% loss to follow up; over-sampling of HIV-positive clients until min of 400 in Intervention & Comparison facilities

1978 clients: 989 from Intervention and 989 from Comparison facilities

Household survey

3-stage cluster survey design, for random selection of EAs, households and individuals

80% power to detect 10% increase in % of women who have ever used study facility.

Design effect of 2.0

1632 (816 male; 816 female) within 10km catchment area of FP facilities

n/a

816 (408 male; 408 female) within 10km catchment area of PNC facilities

Qualitative – in-depth interviews

Providers

Convenience sampling

1-3 providers per facility

1-3 providers per facility

1-3 providers per facility

Cohort clients

Purposive sampling to reflect issues emerging from quantitative data

25 HIV-positive clients; and 25 other clients

25 HIV-positive clients; and 25 other clients

25 HIV-positive clients; and 25 other clients

Community members

Purposive sampling to reflect issues emerging from quantitative data

20 men

n/a

20 men