Table 4 The results of k-means clustering (k = 4).

From: Spatial accessibility evaluation and clustering analysis of primary healthcare within 15 min circles in a northern Chinese megacity

Cluster

Name

Districts in cluster

1

Underdeveloped primary healthcare service areas

Dongli, Xiqing, Jinnan, Beichen, Baodi, Ninghe, Jinghai, Binhai

2

Highly concentrated and saturated primary healthcare service areas

Heping, Nankai

3

Balanced primary healthcare service areas

Hedong, Hexi, Hebei, Hongqiao

4

Peripheral high-accessibility areas with limited infrastructure

Wuqing, Jizhou