Table 2: Themes and sub-themes as nurses’ perceptions about stock-outs of essential medicines.

Themes	Sub-themes
1. Status of medicines stock-outs	1.1 Health centre versus clinics 1.2 Duration of stock-outs 1.3 Medicines with frequent stock-outs
2. Structure related factors	2.1 Management and administrative concerns 2.2 Supplier - distribution constraints 2.3 Institution-based challenges 2.4 Shortage of human resources for health
3. Human related factors	3.1 Service-providers related 3.2 Patient-related