Developing a Measure to Quantify Ocular Pain Postoperatively: The Adaptation of the Ocular Pain Assessment Survey

Table 3

The Correlation between the gold standard VAS pain measurement and the subscales of Turkish adaptation of OPAS. The Spearman’s correlation coefficient is calculated for each item in the survey. The final section on pain relief is not included in the analysis. A strong correlation is defined with a correlation coefficient of approximately 0.6, whereas a low correlation is defined with a coefficient between 0.3 and 0.6. Significance is determined as <0.05.

Items		PRE		POST		LATE-POST
		Correlation coefficient	Significance (-value)	Correlation coefficient	Significance (-value)	Correlation coefficient	Significance (-value)
24 h eye pain	Most	0.677	<0.001	0.789	<0.001	0.623	<0.001
	Least	0.467	<0.001	0.478	<0.001	0.155	0.076
	Avg.	0.660	˂0.001	0.741	<0.001	0.589	<0.001
2 wks eye pain	Most	0.556	˂0.001	0.272	0.002	0.247	0.004
	Least	0.269	˂0.001	0.258	0.003	0.094	0.288
	Avg.	0.555	˂0.001	0.094	0.283	0.244	0.005
Noneye pain	Most	0.577	<0.001	0.202	0.020	0.371	<0.001
	Least	0.542	<0.001	0.156	0.075	0.305	<0.001
	Avg.	0.452	<0.001	0.198	0.023	0.400	<0.001
Quality of life	Reading/Computer	0.499	<0.001	0.483	<0.001	0.327	<0.001
	Driving/TV	0.565	<0.001	0.518	<0.001	0.362	<0.001
	General	0.544	<0.001	0.547	<0.001	0.354	<0.001
	Mood	0.402	<0.001	0.526	<0.001	0.289	0.001
	Sleep	0.542	<0.001	0.416	<0.001	0.261	0.003
	Relations	0.452	<0.001	0.373	<0.001	0.202	0.021
	Thinking abt. pain	0.592	<0.001	0.511	<0.001	0.464	<0.001
Aggravating factors	Wind/AC/Dry air	0.397	<0.001	0.332	<0.001	0.136	0.122
	Volatile chemicals	0.233	0.007	0.239	0.006	0.090	0.308
Associated factors	Red	0.174	0.046	0.210	0.016	0.276	0.001
	Burn	0.430	<0.001	0.400	<0.001	0.288	0.001
	Photosensitivity	0.422	<0.001	0.253	0.003	0.198	0.023
	Tearing	0.350	<0.001	0.222	0.010	0.102	0.247