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Table 1 Multistage maximum heterogeneity sample calculation

From: Young medical doctors’ perspectives on professionalism: a qualitative study conducted in public hospitals in Pakistan

Sampling stage 1 Selection of hospitals Criteria:
Largest public-sector teaching hospital in provinces of Sindh, Punjab and the State of Azad Jammu & Kashmir (AJ&K)
1 hospital in Punjab
1 hospital in Sindh
1 hospital in AJ&K
Sampling stage 2 Recruitment of doctors Criteria:
(i) Age: 24 to 32 years / 33 to 40 years
(ii) Gender: male / female
(iii) Service level: house officer, medical officer, PGT trainee, senior registrar, specialist
Calculating factor: 2 × 2 × 5 = 20 doctors selected in each hospital