Table 3. The latent time from surfacing to the onset of symptoms and the number of cases with different severities in 5,278 DCI cases.

Latent time	Case (n)	Number of cases with different severity [n(%)]*
		Mild	Moderate	Severe
≤10 min	1,139	545 (47.8%)	436 (38.3%)	158 (13.9%)
10–30 min	1,409	828 (58.8%)	471 (33.4%)	110 (7.8%)
30 min–1 h	1,648	1445 (87.7%)	154 (9.3%)	49 (3.0%)
1 h–3 h	905	841 (92.9%)	58 (6.4%)	6 (0.7%)
3 h–6 h	120	116 (96.7%)	4 (3.3%)	0 (0.0%)
6 h–24 h	49	48 (98.0%)	1 (2.0%)	0 (0.0%)
24 h–48 h	8	8 (100.0%)	0 (0.0%)	0 (0.0%)
Total	5,278	3,831 (72.6%)	1,124 (21.3%)	323 (6.1%)

^*Kendall correlation analysis showed a weak negative correlation between the severity and the latent time (τ = −0.3604, P<0.0001).