Table 3.

Regression analysis of relative risks for interventions and discontinuation before and after inverse probability of treatment weighting

Intervention	Model	Without intervention	With intervention	Relative risk	95% CI	P‐value
Practices including nutritional guidance and ophthalmological examination	Before IPTW	22.5%	14.7%	0.65	0.58–0.74	<0.001
	After IPTW	21.8%	17.2%	0.79	0.69–0.91	0.001
Nutritional guidance	Before IPTW	21.6%	14.3%	0.66	0.57–0.76	<0.001
	After IPTW	21.1%	15.9%	0.75	0.62–0.90	0.002
Ophthalmological examination	Before IPTW	21.6%	13.2%	0.61	0.52–0.72	<0.001
	After IPTW	20.7%	19.3%	0.93	0.74–1.17	0.551

CI, confidence interval; IPTW, inverse probability of treatment weighting.